1 files changed, 33 insertions, 0 deletions
diff --git a/source/x/x11/patch/xorg-server/xorg-server.CVE-2021-4011.e56f61c79fc3cee26d83cda0f84ae56d5979f768.patch b/source/x/x11/patch/xorg-server/xorg-server.CVE-2021-4011.e56f61c79fc3cee26d83cda0f84ae56d5979f768.patch
new file mode 100644
index 00000000..2f3e4197
--- /dev/null
+++ b/source/x/x11/patch/xorg-server/xorg-server.CVE-2021-4011.e56f61c79fc3cee26d83cda0f84ae56d5979f768.patch
@@ -0,0 +1,33 @@
+From e56f61c79fc3cee26d83cda0f84ae56d5979f768 Mon Sep 17 00:00:00 2001
+From: Povilas Kanapickas <povilas@radix.lt>
+Date: Tue, 14 Dec 2021 15:00:00 +0200
+Subject: [PATCH] record: Fix out of bounds access in SwapCreateRegister()
+
+ZDI-CAN-14952, CVE-2021-4011
+
+This vulnerability was discovered and the fix was suggested by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
+---
+ record/record.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/record/record.c b/record/record.c
+index be154525d..e123867a7 100644
+--- a/record/record.c
++++ b/record/record.c
+@@ -2516,8 +2516,8 @@ SwapCreateRegister(ClientPtr client, xRecordRegisterClientsReq * stuff)
+         swapl(pClientID);
+     }
+     if (stuff->nRanges >
+-        client->req_len - bytes_to_int32(sz_xRecordRegisterClientsReq)
+-        - stuff->nClients)
++        (client->req_len - bytes_to_int32(sz_xRecordRegisterClientsReq)
++        - stuff->nClients) / bytes_to_int32(sz_xRecordRange))
+         return BadLength;
+     RecordSwapRanges((xRecordRange *) pClientID, stuff->nRanges);
+     return Success;
+-- 
+GitLab
+