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author | Mike DePaulo <mikedep333@gmail.com> | 2015-01-10 12:03:47 -0500 |
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committer | Mike DePaulo <mikedep333@gmail.com> | 2015-01-10 12:06:49 -0500 |
commit | 7e1c3b94f42dfc5e52f0f724b6bf7d03e3b743e3 (patch) | |
tree | f2a4bfed7809a8e0bf4d06ec56a80191badba48b /xorg-server/glx/clientinfo.c | |
parent | 212ca5c6023b6b7455ad64b2c29aeff82f301a03 (diff) | |
download | vcxsrv-7e1c3b94f42dfc5e52f0f724b6bf7d03e3b743e3.tar.gz vcxsrv-7e1c3b94f42dfc5e52f0f724b6bf7d03e3b743e3.tar.bz2 vcxsrv-7e1c3b94f42dfc5e52f0f724b6bf7d03e3b743e3.zip |
Fix CVE-2014-8091..8103. Patches were ported from Ubuntu 14.04 (xorg-server 1.15.1)
Diffstat (limited to 'xorg-server/glx/clientinfo.c')
-rw-r--r-- | xorg-server/glx/clientinfo.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/xorg-server/glx/clientinfo.c b/xorg-server/glx/clientinfo.c index 4aaa4c967..74ad91991 100644 --- a/xorg-server/glx/clientinfo.c +++ b/xorg-server/glx/clientinfo.c @@ -33,18 +33,22 @@ static int set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req, unsigned bytes_per_version) { + ClientPtr client = cl->client; char *gl_extensions; char *glx_extensions; + int size; + + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); /* Verify that the size of the packet matches the size inferred from the * sizes specified for the various fields. */ - const unsigned expected_size = sz_xGLXSetClientInfoARBReq - + (req->numVersions * bytes_per_version) - + __GLX_PAD(req->numGLExtensionBytes) - + __GLX_PAD(req->numGLXExtensionBytes); + size = sz_xGLXSetClientInfoARBReq; + size = safe_add(size, safe_mul(req->numVersions, bytes_per_version)); + size = safe_add(size, safe_pad(req->numGLExtensionBytes)); + size = safe_add(size, safe_pad(req->numGLXExtensionBytes)); - if (req->length != (expected_size / 4)) + if (size < 0 || req->length != (size / 4)) return BadLength; /* Verify that the actual length of the GL extension string matches what's @@ -80,8 +84,11 @@ __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc) int __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc) { + ClientPtr client = cl->client; xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc; + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); + req->length = bswap_16(req->length); req->numVersions = bswap_32(req->numVersions); req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes); @@ -99,8 +106,11 @@ __glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc) int __glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc) { + ClientPtr client = cl->client; xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc; + REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq); + req->length = bswap_16(req->length); req->numVersions = bswap_32(req->numVersions); req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes); |