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* XStringToKeysym: Cope with 0x1234cafe-style inputDaniel Stone2016-10-191-0/+10
| | | | | | | | | If we get input in the style of 0xdeadbeef, just return that exact keysym. Introduces a dependency on strtoul, which I'm told is OK on all the systems we care about. Signed-off-by: Daniel Stone <daniel@fooishbar.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* XStringToKeysym: Check strdup() return valueDaniel Stone2016-10-191-0/+2
| | | | | | Signed-off-by: Daniel Stone <daniel@fooishbar.org> Reviewed-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Delete now-redundant XKeysymDBDaniel Stone2016-10-192-385/+0
| | | | | | | | | | Since XStringToKeysym now supports all the vendor keysyms, just delete our XKeysymDB, which was incomplete at best, misleading at worst, and always an annoyance. Signed-off-by: Daniel Stone <daniel@fooishbar.org> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* XStringToKeysym: Special case for XF86 keysymsDaniel Stone2016-10-191-0/+13
| | | | | | | | | | Some XFree86 keysyms were in XKeysymDB as XF86_foo, despite really being XF86foo. So, if we get to the bottom of XStringToKeysym and haven't found our XF86_foo, try it again as XF86foo. Signed-off-by: Daniel Stone <daniel@fooishbar.org> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* nx-X11/programs/Xserver/GL/glx/Imakefile: typo fix, leading to ↵Mihai Moldovan2016-10-141-1/+1
| | | | | | glcontextmodes.c not being compiled. The typo didn't cause immediate problems.
* hw/nxagent/{Clipboard|Events}.c: Typo fix in error messages.Mike Gabriel2016-10-132-3/+3
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* Pending.c: conditionally include stdio.hUlrich Sibiller2016-10-131-0/+2
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* Add a couple fixups for the security patchesJulien Cristau2016-10-123-2/+3
| | | | | | | | | Add a couple fixups for the security patches - off-by-one in xkb - memory leak in an error path Backport from debian to NX: Ulrich Sibiller <uli42@gmx.de>
* XListFontsWithInfo: Re-decrement flist[0] before calling free() on it.Matthieu Herrb2016-10-121-2/+4
| | | | | | | | | | | Freeing a pointer that wasn't returned by malloc() is undefined behavior and produces an error with OpenBSD's implementation. Signed-off-by: Matthieu Herrb <matthieu.herrb@laas.fr> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* _XkbReadGetMapReply: reject maxKeyCodes smaller than the minKeyCodeAlan Coopersmith2016-10-121-0/+2
| | | | | | | | | Various other bounds checks in the code assume this is true, so enforce it when we first get the data from the X server. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Use calloc in XOpenDisplay to initialize structs containing pointersAlan Coopersmith2016-10-121-9/+4
| | | | | | | | | | Prevents trying to free uninitialized pointers if we have to bail out partway through setup, such as if we receive a corrupted or incomplete connection setup block from the server. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Unbounded recursion in _XimParseStringFile() when parsing include files ↵Alan Coopersmith2016-10-121-3/+17
| | | | | | | | | | | | | | | | | [CVE-2013-2004 2/2] parseline() can call _XimParseStringFile() which can call parseline() which can call _XimParseStringFile() which can call parseline() .... eventually causing recursive stack overflow and crash. Limit is set to a include depth of 100 files, which should be enough for all known use cases, but could be adjusted later if necessary. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Unbounded recursion in GetDatabase() when parsing include files ↵Alan Coopersmith2016-10-121-9/+15
| | | | | | | | | | | | | | | | | | | [CVE-2013-2004 1/2] GetIncludeFile() can call GetDatabase() which can call GetIncludeFile() which can call GetDatabase() which can call GetIncludeFile() .... eventually causing recursive stack overflow and crash. Easily reproduced with a resource file that #includes itself. Limit is set to a include depth of 100 files, which should be enough for all known use cases, but could be adjusted later if necessary. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Avoid overflows in XListExtensions() [CVE-2013-1997 15/15]Alan Coopersmith2016-10-121-14/+22
| | | | | | | | | | Ensure that when breaking the returned list into individual strings, we don't walk past the end of allocated memory to write the '\0' bytes Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Avoid overflows in XGetFontPath() [CVE-2013-1997 14/15]Alan Coopersmith2016-10-121-14/+22
| | | | | | | | | | Ensure that when breaking the returned list into individual strings, we don't walk past the end of allocated memory to write the '\0' bytes Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Avoid overflows in XListFonts() [CVE-2013-1997 13/15]Alan Coopersmith2016-10-121-13/+22
| | | | | | | | | | Ensure that when breaking the returned list into individual strings, we don't walk past the end of allocated memory to write the '\0' bytes Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated length in _XimXGetReadData() [CVE-2013-1997 12/15]Alan Coopersmith2016-10-121-1/+1
| | | | | | | | | | | Check the provided buffer size against the amount of data we're going to write into it, not against the reported length from the ClientMessage. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index/length in _XkbReadGetNamesReply() [CVE-2013-1997 11/15]Alan Coopersmith2016-10-121-0/+2
| | | | | | | | | | | If the X server returns key name indexes outside the range of the number of keys it told us to allocate, out of bounds memory writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadVirtualModMap() [CVE-2013-1997 10/15]Alan Coopersmith2016-10-121-0/+3
| | | | | | | | | | | If the X server returns modifier map indexes outside the range of the number of keys it told us to allocate, out of bounds memory writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadExplicitComponents() [CVE-2013-1997 9/15]Alan Coopersmith2016-10-121-1/+5
| | | | | | | | | | | If the X server returns key indexes outside the range of the number of keys it told us to allocate, out of bounds memory writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadModifierMap() [CVE-2013-1997 8/15]Alan Coopersmith2016-10-121-0/+5
| | | | | | | | | | | If the X server returns modifier map indexes outside the range of the number of keys it told us to allocate, out of bounds memory writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadKeyBehaviors() [CVE-2013-1997 7/15]Alan Coopersmith2016-10-121-2/+4
| | | | | | | | | | | If the X server returns key behavior indexes outside the range of the number of keys it told us to allocate, out of bounds memory writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadKeyActions() [CVE-2013-1997 6/15]Alan Coopersmith2016-10-121-0/+4
| | | | | | | | | | | If the X server returns key action indexes outside the range of the number of keys it told us to allocate, out of bounds memory access could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadKeySyms() [CVE-2013-1997 5/15]Alan Coopersmith2016-10-121-1/+6
| | | | | | | | | | | If the X server returns keymap indexes outside the range of the number of keys it told us to allocate, out of bounds memory access could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated indexes in _XkbReadGetGeometryReply() [CVE-2013-1997 4/15]Alan Coopersmith2016-10-121-0/+3
| | | | | | | | | | | If the X server returns color indexes outside the range of the number of colors it told us to allocate, out of bounds memory access could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated indexes in _XkbReadGeomShapes() [CVE-2013-1997 3/15]Alan Coopersmith2016-10-121-4/+8
| | | | | | | | | | | If the X server returns shape indexes outside the range of the number of shapes it told us to allocate, out of bounds memory access could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated index in _XkbReadGetDeviceInfoReply() [CVE-2013-1997 2/15]Alan Coopersmith2016-10-121-0/+6
| | | | | | | | | | | If the X server returns more buttons than are allocated in the XKB device info structures, out of bounds writes could occur. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* unvalidated lengths in XAllocColorCells() [CVE-2013-1997 1/15]Alan Coopersmith2016-10-121-2/+7
| | | | | | | | | | | | If a broken server returned larger than requested values for nPixels or nMasks, XAllocColorCells would happily overflow the buffers provided by the caller to write the results into. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Make XGetWindowProperty() always initialize returned valuesAlan Coopersmith2016-10-121-1/+7
| | | | | | | | | | | | | | Avoids memory corruption and other errors when callers access them without checking to see if XGetWindowProperty() returned an error value. Callers are still required to check for errors, this just reduces the damage when they don't. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Move repeated #ifdef magic to find PATH_MAX into a common headerAlan Coopersmith2016-10-124-48/+85
| | | | | | | | | Lets stop duplicating the mess all over Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Convert more _XEatData callers to _XEatDataWordsAlan Coopersmith2016-10-126-20/+20
| | | | | | | Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XGetModifierMapping() [CVE-2013-1981 13/13]Alan Coopersmith2016-10-121-4/+9
| | | | | | | | | Ensure that we don't underallocate when the server claims a very large reply Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XGetPointerMapping() & XGetKeyboardMapping() ↵Alan Coopersmith2016-10-121-11/+20
| | | | | | | | | | | [CVE-2013-1981 12/13] Ensure that we don't underallocate when the server claims a very large reply Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XGetImage() [CVE-2013-1981 11/13]Alan Coopersmith2016-10-121-4/+8
| | | | | | | | | | Ensure that we don't underallocate when the server claims to have sent a very large reply. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XGetWindowProperty() [CVE-2013-1981 10/13]Alan Coopersmith2016-10-121-9/+16
| | | | | | | | | | | | If the reported number of properties is too large, the calculations to allocate memory for them may overflow, leaving us returning less memory to the caller than implied by the value written to *nitems. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflows in TransFileName() [CVE-2013-1981 9/13]Alan Coopersmith2016-10-121-11/+34
| | | | | | | | | | | | | | | | | | When trying to process file paths the tokens %H, %L, & %S are expanded to $HOME, the standard compose file path & the xlocaledir path. If enough of these tokens are repeated and values like $HOME are set to very large values, the calculation of the total string size required to hold the expanded path can overflow, resulting in allocating a smaller string than the amount of data we'll write to it. Simply restrict all of these values, and the total path size to PATH_MAX, because really, that's all you should need for a filename path. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer truncation in _XimParseStringFile() [CVE-2013-1981 8/13]Alan Coopersmith2016-10-121-0/+3
| | | | | | | | | | | | | | | | | | | | | | | Called from _XimCreateDefaultTree() which uses getenv("XCOMPOSEFILE") to specify filename. If the size of off_t is larger than the size of unsigned long (as in 32-bit builds with large file flags), a file larger than 4 gigs could have its size truncated, leading to data from that file being written past the end of the undersized buffer allocated for it. While configure.ac does not use AC_SYS_LARGEFILE to set large file mode, builders may have added the large file compilation flags to CFLAGS on their own. size is left limited to an int, because if your Xim file is larger than 2gb, you're doing it wrong. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in ReadInFile() in Xrm.c [CVE-2013-1981 7/13]Alan Coopersmith2016-10-121-1/+3
| | | | | | | | | | | | | | | | | | | Called from XrmGetFileDatabase() which gets called from InitDefaults() which gets the filename from getenv ("XENVIRONMENT") If file is exactly 0xffffffff bytes long (or longer and truncates to 0xffffffff, on implementations where off_t is larger than an int), then size may be set to a value which overflows causing less memory to be allocated than is written to by the following read() call. size is left limited to an int, because if your Xresources file is larger than 2gb, you're very definitely doing it wrong. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Integer overflows in stringSectionSize() cause buffer overflow in ↵Alan Coopersmith2016-10-121-6/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | ReadColornameDB() [CVE-2013-1981 6/13] LoadColornameDB() calls stringSectionSize() to do a first pass over the file (which may be provided by the user via XCMSDB environment variable) to determine how much memory needs to be allocated to read in the file, then allocates the returned sizes and calls ReadColornameDB() to load the data from the file into that newly allocated memory. If stringSectionSize() overflows the signed ints used to calculate the file size (say if you have an xcmsdb with ~4 billion lines in or a combined string length of ~4 gig - which while it may have been inconceivable when Xlib was written, is quite possible today), then LoadColornameDB() may allocate a memory buffer much smaller than the amount of data ReadColornameDB() will write to it. The total size is left limited to an int, because if your xcmsdb file is larger than 2gb, you're doing it wrong. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XListHosts() [CVE-2013-1981 5/13]Alan Coopersmith2016-10-121-7/+15
| | | | | | | | | | | | If the reported number of host entries is too large, the calculations to allocate memory for them may overflow, leaving us writing beyond the bounds of the allocation. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XGetMotionEvents() [CVE-2013-1981 4/13]Alan Coopersmith2016-10-121-15/+11
| | | | | | | | | | | | | If the reported number of motion events is too large, the calculations to allocate memory for them may overflow, leaving us writing beyond the bounds of the allocation. v2: Ensure nEvents is set to 0 when returning NULL events pointer Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in XListFontsWithInfo() [CVE-2013-1981 3/13]Alan Coopersmith2016-10-121-56/+49
| | | | | | | | | | | | | | If the reported number of remaining fonts is too large, the calculations to allocate memory for them may overflow, leaving us writing beyond the bounds of the allocation. v2: Fix reply_left calculations, check calculated sizes fit in reply_left v3: On error cases, also set values to be returned in pointer args to 0/NULL Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in _XF86BigfontQueryFont() [CVE-2013-1981 2/13]Alan Coopersmith2016-10-121-17/+25
| | | | | | | | | | | | Similar to _XQueryFont, but with more ways to go wrong and overflow. Only compiled if libX11 is built with XF86BigFont support. v2: Fix reply_left calculations, check calculated sizes fit in reply_left Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* integer overflow in _XQueryFont() on 32-bit platforms [CVE-2013-1981 1/13]Alan Coopersmith2016-10-121-12/+25
| | | | | | | | | | | | | If the CARD32 reply.nCharInfos * sizeof(XCharStruct) overflows an unsigned long, then too small of a buffer will be allocated for the data copied in from the reply. v2: Fix reply_left calculations, check calculated sizes fit in reply_left Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* XListFontsWithInfo: avoid accessing realloc'ed memoryNickolai Zeldovich2016-10-121-6/+7
| | | | | | | | | | | | | If exactly one of the two reallocs in XListFontsWithInfo() fails, the subsequent code accesses memory freed by the other realloc. Signed-off-by: Nickolai Zeldovich <nickolai@csail.mit.edu> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> (cherry picked from commit deedeada53676ee529d700bf96fde0b29a3a1def) Signed-off-by: Julien Cristau <jcristau@debian.org> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* ximcp: Prevent memory leak & double free if multiple %L in stringAlan Coopersmith2016-10-121-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In the highly unlikely event that TransFileName was passed a path containing multiple %L entries, for each entry it would call _XlcFileName, leaking the previous results, and then for each entry it would copy from that pointer and free it, resulting in invalid pointers & possible double frees for each use after the first one freed it. Error: Use after free (CWE 416) Use after free of pointer 'lcCompose' at line 358 of nx-X11/lib/X11/imLcPrs.c in function 'TransFileName'. Previously freed at line 360 with free. Error: Use after free (CWE 416) Use after free of pointer 'lcCompose' at line 359 of nx-X11/lib/X11/imLcPrs.c in function 'TransFileName'. Previously freed at line 360 with free. Error: Double free (CWE 415) Double free of pointer 'lcCompose' at line 360 of nx-X11/lib/X11/imLcPrs.c in function 'TransFileName'. Previously freed at line 360 with free. [ This bug was found by the Parfait 0.3.6 bug checking tool. For more information see http://labs.oracle.com/projects/parfait/ ] Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> (cherry picked from commit 6ac417cea1136a3617f5e40f4b106aaa3f48d6c2) Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Xrm: Handle the extremely unlikely situation of fstat failingErkki Seppälä2016-10-121-0/+6
| | | | | | | | | | | Tracked variable "size" was passed to a negative sink. Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan-de-oliveira@nokia.com> Signed-off-by: Erkki Seppälä <erkki.seppala@vincit.fi> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> (cherry picked from commit be3e6c205d94dedc1cdebf5d17b987f0f828377a) Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>
* Use both __APPLE__ and __DARWIN__ definesUlrich Sibiller2016-10-104-7/+7
| | | | | | | | Imake unsets __APPLE__ and sets __DARWIN__ instead while autoconf seems to use __APPLE__ and not __DARWIN__ anymore. This way we should stay safe for now. Can be changed to __APPLE__ when we switch to modular.
* MakeBigReq: don't move the last word, already handled by Data32 (X.Org ↵Karl Tomlinson2016-10-101-2/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | CVE-2013-7439). MakeBigReq inserts a length field after the first 4 bytes of the request (after req->length), pushing everything else back by 4 bytes. The current memmove moves everything but the first 4 bytes back. If a request aligns to the end of the buffer pointer when MakeBigReq is invoked for that request, this runs over the buffer. Instead, we need to memmove minus the first 4 bytes (which aren't moved), minus the last 4 bytes (so we still align to the previous tail). The 4 bytes that fell out are already handled with Data32, which will handle the buffermax correctly. The case where req->length = 1 was already not functional. Reported by Abhishek Arya <inferno@chromium.org> (against X.Org BTS). https://bugzilla.mozilla.org/show_bug.cgi?id=803762 Reviewed-by: Jeff Muizelaar <jmuizelaar@mozilla.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Rebased-for-NX: Mike Gabriel <mike.gabriel@das-netzwerkteam.de> Re-applied after upgrade to libX11 1.3.4: Ulrich Sibiller <uli42@gmx.de>
* Give GNU & Solaris Studio compilers hints about XEatData branchesAlan Coopersmith2016-10-101-2/+14
| | | | | | | | Try to offset the cost of all the recent checks we've added by giving the compiler a hint that the branches that involve us eating data are less likely to be used than the ones that process it. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
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