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authorMike DePaulo <mikedep333@gmail.com>2015-02-08 19:15:20 -0500
committerMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-14 16:14:31 +0100
commitaf55da1e9c1a6a352b24823a8f7062c288ffbbc0 (patch)
treec40bf03134cb49ce7b8aac584346e9c08c965ffb /nx-X11/lib/font/fontfile
parent902dc519d96be582088e5fe0644cefac7ecc0133 (diff)
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LZW decompress: fix for CVE-2011-2895 From xorg/lib/Xfont commit d11ee5886e9d9ec610051a206b135a4cdc1e09a0
Specially crafted LZW stream can crash an application using libXfont that is used to open untrusted font files. With X server, this may allow privilege escalation when exploited
Diffstat (limited to 'nx-X11/lib/font/fontfile')
-rw-r--r--nx-X11/lib/font/fontfile/decompress.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/nx-X11/lib/font/fontfile/decompress.c b/nx-X11/lib/font/fontfile/decompress.c
index a4c546871..553b31585 100644
--- a/nx-X11/lib/font/fontfile/decompress.c
+++ b/nx-X11/lib/font/fontfile/decompress.c
@@ -261,6 +261,8 @@ BufCompressedFill (BufFilePtr f)
*/
while ( code >= 256 )
{
+ if (stackp - de_stack >= STACK_SIZE - 1)
+ return BUFFILEEOF;
*stackp++ = file->tab_suffix[code];
code = file->tab_prefix[code];
}