diff options
Diffstat (limited to 'gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch')
| -rw-r--r-- | gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch | 152 |
1 files changed, 0 insertions, 152 deletions
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 deleted file mode 100644 index 9df6cf3f4d..0000000000 --- a/gnu/packages/patches/libxtst-CVE-2016-7951-CVE-2016-7952.patch +++ /dev/null @@ -1,152 +0,0 @@ -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 - |