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-rw-r--r--gnu/local.mk1
-rw-r--r--gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch152
-rw-r--r--gnu/packages/xorg.scm8
3 files changed, 161 insertions, 0 deletions
diff --git a/gnu/local.mk b/gnu/local.mk
index ec237d9366..7489ab7696 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -676,6 +676,7 @@ dist_patch_DATA = \
%D%/packages/patches/libxrandr-CVE-2016-7947-CVE-2016-7948.patch \
%D%/packages/patches/libxrender-CVE-2016-7949.patch \
%D%/packages/patches/libxrender-CVE-2016-7950.patch \
+ %D%/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch \
%D%/packages/patches/libxslt-generated-ids.patch \
%D%/packages/patches/lirc-localstatedir.patch \
%D%/packages/patches/llvm-for-extempore.patch \
diff --git a/gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch b/gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch
new file mode 100644
index 0000000000..9df6cf3f4d
--- /dev/null
+++ b/gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch
@@ -0,0 +1,152 @@
+Fix CVE-2016-7951 and CVE-2016-7952
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7951
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7952
+
+Patch copied from upstream source repository:
+
+https://cgit.freedesktop.org/xorg/lib/libXtst/commit/?id=9556ad67af3129ec4a7a4f4b54a0d59701beeae3
+
+From 9556ad67af3129ec4a7a4f4b54a0d59701beeae3 Mon Sep 17 00:00:00 2001
+From: Tobias Stoeckmann <tobias@stoeckmann.org>
+Date: Sun, 25 Sep 2016 21:37:01 +0200
+Subject: [PATCH] Out of boundary access and endless loop in libXtst
+
+A lack of range checks in libXtst allows out of boundary accesses.
+The checks have to be done in-place here, because it cannot be done
+without in-depth knowledge of the read data.
+
+If XRecordStartOfData, XRecordEndOfData, or XRecordClientDied
+without a client sequence have attached data, an endless loop would
+occur. The do-while-loop continues until the current index reaches
+the end. But in these cases, the current index would not be
+incremented, leading to an endless processing.
+
+Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
+Reviewed-by: Matthieu Herrb <matthieu@herrb.eu>
+---
+ src/XRecord.c | 43 +++++++++++++++++++++++++++++++++++++++----
+ 1 file changed, 39 insertions(+), 4 deletions(-)
+
+diff --git a/src/XRecord.c b/src/XRecord.c
+index 50420c0..fefd842 100644
+--- a/src/XRecord.c
++++ b/src/XRecord.c
+@@ -749,15 +749,23 @@ parse_reply_call_callback(
+ switch (rep->category) {
+ case XRecordFromServer:
+ if (rep->elementHeader&XRecordFromServerTime) {
++ if (current_index + 4 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index,
+ data->server_time);
+ current_index += 4;
+ }
++ if (current_index + 1 > rep->length << 2)
++ return Error;
+ switch (reply->buf[current_index]) {
+ case X_Reply: /* reply */
++ if (current_index + 8 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index+4, datum_bytes);
++ if (datum_bytes < 0 || datum_bytes > ((INT_MAX >> 2) - 8))
++ return Error;
+ datum_bytes = (datum_bytes+8) << 2;
+ break;
+ default: /* error or event */
+@@ -766,52 +774,73 @@ parse_reply_call_callback(
+ break;
+ case XRecordFromClient:
+ if (rep->elementHeader&XRecordFromClientTime) {
++ if (current_index + 4 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index,
+ data->server_time);
+ current_index += 4;
+ }
+ if (rep->elementHeader&XRecordFromClientSequence) {
++ if (current_index + 4 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index,
+ data->client_seq);
+ current_index += 4;
+ }
++ if (current_index + 4 > rep->length<<2)
++ return Error;
+ if (reply->buf[current_index+2] == 0
+ && reply->buf[current_index+3] == 0) /* needn't swap 0 */
+ { /* BIG-REQUESTS */
++ if (current_index + 8 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index+4, datum_bytes);
+ } else {
+ EXTRACT_CARD16(rep->clientSwapped,
+ reply->buf+current_index+2, datum_bytes);
+ }
++ if (datum_bytes < 0 || datum_bytes > INT_MAX >> 2)
++ return Error;
+ datum_bytes <<= 2;
+ break;
+ case XRecordClientStarted:
++ if (current_index + 8 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD16(rep->clientSwapped,
+ reply->buf+current_index+6, datum_bytes);
+ datum_bytes = (datum_bytes+2) << 2;
+ break;
+ case XRecordClientDied:
+ if (rep->elementHeader&XRecordFromClientSequence) {
++ if (current_index + 4 > rep->length << 2)
++ return Error;
+ EXTRACT_CARD32(rep->clientSwapped,
+ reply->buf+current_index,
+ data->client_seq);
+ current_index += 4;
+- }
+- /* fall through */
++ } else if (current_index < rep->length << 2)
++ return Error;
++ datum_bytes = 0;
++ break;
+ case XRecordStartOfData:
+ case XRecordEndOfData:
++ if (current_index < rep->length << 2)
++ return Error;
+ datum_bytes = 0;
++ break;
+ }
+
+ if (datum_bytes > 0) {
+- if (current_index + datum_bytes > rep->length << 2)
++ if (INT_MAX - datum_bytes < (rep->length << 2) - current_index) {
+ fprintf(stderr,
+ "XRecord: %lu-byte reply claims %d-byte element (seq %lu)\n",
+- (long)rep->length << 2, current_index + datum_bytes,
++ (unsigned long)rep->length << 2, current_index + datum_bytes,
+ dpy->last_request_read);
++ return Error;
++ }
+ /*
+ * This assignment (and indeed the whole buffer sharing
+ * scheme) assumes arbitrary 4-byte boundaries are
+@@ -863,6 +892,12 @@ XRecordEnableContext(Display *dpy, XRecordContext context,
+ return 0;
+ }
+
++ if (rep.length > INT_MAX >> 2) {
++ UnlockDisplay(dpy);
++ SyncHandle();
++ return 0;
++ }
++
+ if (rep.length > 0) {
+ reply = alloc_reply_buffer(info, rep.length<<2);
+ if (!reply) {
+--
+2.10.1
+
diff --git a/gnu/packages/xorg.scm b/gnu/packages/xorg.scm
index 2df6631e2a..111de2b65a 100644
--- a/gnu/packages/xorg.scm
+++ b/gnu/packages/xorg.scm
@@ -4639,6 +4639,7 @@ cannot be adequately worked around on the client side of the wire.")
(define-public libxtst
(package
(name "libxtst")
+ (replacement libxtst/fixed)
(version "1.2.2")
(source
(origin
@@ -4674,6 +4675,13 @@ The RECORD extension supports the recording and reporting of all core X
protocol and arbitrary X extension protocol.")
(license license:x11)))
+(define libxtst/fixed
+ (package
+ (inherit libxtst)
+ (source (origin
+ (inherit (package-source libxtst))
+ (patches (search-patches
+ "libxtst-CVE-2016-7951-CVE-2016-7952.patch"))))))
(define-public libxv
(package
generated by cgit v1.2.3 (git 2.25.4) at 2024-11-06 15:33:03 +0000