summaryrefslogtreecommitdiff
path: root/gnu/packages/patches
diff options
context:
space:
mode:
authorLeo Famulari <leo@famulari.name>2016-10-05 13:30:39 -0400
committerLeo Famulari <leo@famulari.name>2016-10-05 17:37:22 -0400
commite73631a906429bbaccfaafdb24070260bc914d8d (patch)
tree3b2fc024036e6b424278d25d7f18ed3a78f6ffb9 /gnu/packages/patches
parent1f90b80f8bf776cce5c312b3c519c3fa79fc79f5 (diff)
gnu: libxv: Fix CVE-2016-5407.
* gnu/packages/patches/libxv-CVE-2016-5407.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/xorg.scm (libxv)[replacement]: New field. (libxv/fixed): New variable.
Diffstat (limited to 'gnu/packages/patches')
-rw-r--r--gnu/packages/patches/libxv-CVE-2016-5407.patch162
1 files changed, 162 insertions, 0 deletions
diff --git a/gnu/packages/patches/libxv-CVE-2016-5407.patch b/gnu/packages/patches/libxv-CVE-2016-5407.patch
new file mode 100644
index 0000000000..e6a76c9f70
--- /dev/null
+++ b/gnu/packages/patches/libxv-CVE-2016-5407.patch
@@ -0,0 +1,162 @@
+Fix CVE-2016-5407:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5407
+
+Patch copied from upstream source repository:
+
+https://cgit.freedesktop.org/xorg/lib/libXv/commit/?id=d9da580b46a28ab497de2e94fdc7b9ff953dab17
+
+From d9da580b46a28ab497de2e94fdc7b9ff953dab17 Mon Sep 17 00:00:00 2001
+From: Tobias Stoeckmann <tobias@stoeckmann.org>
+Date: Sun, 25 Sep 2016 21:30:03 +0200
+Subject: [PATCH] Protocol handling issues in libXv - CVE-2016-5407
+
+The Xv query functions for adaptors and encodings suffer from out of
+boundary accesses if a hostile X server sends a maliciously crafted
+response.
+
+A previous fix already checks the received length against fixed values
+but ignores additional length specifications which are stored inside
+the received data.
+
+These lengths are accessed in a for-loop. The easiest way to guarantee
+a correct processing is by validating all lengths against the
+remaining size left before accessing referenced memory.
+
+This makes the previously applied check obsolete, therefore I removed
+it.
+
+Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
+Reviewed-by: Matthieu Herrb <matthieu@herrb.eu>
+---
+ src/Xv.c | 46 +++++++++++++++++++++++++++++-----------------
+ 1 file changed, 29 insertions(+), 17 deletions(-)
+
+diff --git a/src/Xv.c b/src/Xv.c
+index e47093a..be450c4 100644
+--- a/src/Xv.c
++++ b/src/Xv.c
+@@ -158,6 +158,7 @@ XvQueryAdaptors(
+ size_t size;
+ unsigned int ii, jj;
+ char *name;
++ char *end;
+ XvAdaptorInfo *pas = NULL, *pa;
+ XvFormat *pfs, *pf;
+ char *buffer = NULL;
+@@ -197,17 +198,13 @@ XvQueryAdaptors(
+ /* GET INPUT ADAPTORS */
+
+ if (rep.num_adaptors == 0) {
+- /* If there's no adaptors, there's nothing more to do. */
++ /* If there are no adaptors, there's nothing more to do. */
+ status = Success;
+ goto out;
+ }
+
+- if (size < (rep.num_adaptors * sz_xvAdaptorInfo)) {
+- /* If there's not enough data for the number of adaptors,
+- then we have a problem. */
+- status = XvBadReply;
+- goto out;
+- }
++ u.buffer = buffer;
++ end = buffer + size;
+
+ size = rep.num_adaptors * sizeof(XvAdaptorInfo);
+ if ((pas = Xmalloc(size)) == NULL) {
+@@ -225,9 +222,12 @@ XvQueryAdaptors(
+ pa++;
+ }
+
+- u.buffer = buffer;
+ pa = pas;
+ for (ii = 0; ii < rep.num_adaptors; ii++) {
++ if (u.buffer + sz_xvAdaptorInfo > end) {
++ status = XvBadReply;
++ goto out;
++ }
+ pa->type = u.pa->type;
+ pa->base_id = u.pa->base_id;
+ pa->num_ports = u.pa->num_ports;
+@@ -239,6 +239,10 @@ XvQueryAdaptors(
+ size = u.pa->name_size;
+ u.buffer += pad_to_int32(sz_xvAdaptorInfo);
+
++ if (u.buffer + size > end) {
++ status = XvBadReply;
++ goto out;
++ }
+ if ((name = Xmalloc(size + 1)) == NULL) {
+ status = XvBadAlloc;
+ goto out;
+@@ -259,6 +263,11 @@ XvQueryAdaptors(
+
+ pf = pfs;
+ for (jj = 0; jj < pa->num_formats; jj++) {
++ if (u.buffer + sz_xvFormat > end) {
++ Xfree(pfs);
++ status = XvBadReply;
++ goto out;
++ }
+ pf->depth = u.pf->depth;
+ pf->visual_id = u.pf->visual;
+ pf++;
+@@ -327,6 +336,7 @@ XvQueryEncodings(
+ size_t size;
+ unsigned int jj;
+ char *name;
++ char *end;
+ XvEncodingInfo *pes = NULL, *pe;
+ char *buffer = NULL;
+ union {
+@@ -364,17 +374,13 @@ XvQueryEncodings(
+ /* GET ENCODINGS */
+
+ if (rep.num_encodings == 0) {
+- /* If there's no encodings, there's nothing more to do. */
++ /* If there are no encodings, there's nothing more to do. */
+ status = Success;
+ goto out;
+ }
+
+- if (size < (rep.num_encodings * sz_xvEncodingInfo)) {
+- /* If there's not enough data for the number of adaptors,
+- then we have a problem. */
+- status = XvBadReply;
+- goto out;
+- }
++ u.buffer = buffer;
++ end = buffer + size;
+
+ size = rep.num_encodings * sizeof(XvEncodingInfo);
+ if ((pes = Xmalloc(size)) == NULL) {
+@@ -391,10 +397,12 @@ XvQueryEncodings(
+ pe++;
+ }
+
+- u.buffer = buffer;
+-
+ pe = pes;
+ for (jj = 0; jj < rep.num_encodings; jj++) {
++ if (u.buffer + sz_xvEncodingInfo > end) {
++ status = XvBadReply;
++ goto out;
++ }
+ pe->encoding_id = u.pe->encoding;
+ pe->width = u.pe->width;
+ pe->height = u.pe->height;
+@@ -405,6 +413,10 @@ XvQueryEncodings(
+ size = u.pe->name_size;
+ u.buffer += pad_to_int32(sz_xvEncodingInfo);
+
++ if (u.buffer + size > end) {
++ status = XvBadReply;
++ goto out;
++ }
+ if ((name = Xmalloc(size + 1)) == NULL) {
+ status = XvBadAlloc;
+ goto out;
+--
+2.10.1
+