diff options
Diffstat (limited to 'meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-0408.patch')
-rw-r--r-- | meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-0408.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-0408.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-0408.patch new file mode 100644 index 0000000000..c8f75d8a7e --- /dev/null +++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2024-0408.patch @@ -0,0 +1,64 @@ +From e5e8586a12a3ec915673edffa10dc8fe5e15dac3 Mon Sep 17 00:00:00 2001 +From: Olivier Fourdan <ofourdan@redhat.com> +Date: Wed, 6 Dec 2023 12:09:41 +0100 +Subject: [PATCH] glx: Call XACE hooks on the GLX buffer + +The XSELINUX code will label resources at creation by checking the +access mode. When the access mode is DixCreateAccess, it will call the +function to label the new resource SELinuxLabelResource(). + +However, GLX buffers do not go through the XACE hooks when created, +hence leaving the resource actually unlabeled. + +When, later, the client tries to create another resource using that +drawable (like a GC for example), the XSELINUX code would try to use +the security ID of that object which has never been labeled, get a NULL +pointer and crash when checking whether the requested permissions are +granted for subject security ID. + +To avoid the issue, make sure to call the XACE hooks when creating the +GLX buffers. + +Credit goes to Donn Seeley <donn@xmission.com> for providing the patch. + +CVE-2024-0408 + +Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> +Acked-by: Peter Hutterer <peter.hutterer@who-t.net> + +Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/e5e8586a12a3ec915673edffa10dc8fe5e15dac3] +CVE: CVE-2024-0408 +Signed-off-by: Vijay Anusuri <vanusuri@mvista.com> +--- + glx/glxcmds.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +diff --git a/glx/glxcmds.c b/glx/glxcmds.c +index fc26a2e345..1e46d0c723 100644 +--- a/glx/glxcmds.c ++++ b/glx/glxcmds.c +@@ -48,6 +48,7 @@ + #include "indirect_util.h" + #include "protocol-versions.h" + #include "glxvndabi.h" ++#include "xace.h" + + static char GLXServerVendorName[] = "SGI"; + +@@ -1392,6 +1393,13 @@ DoCreatePbuffer(ClientPtr client, int screenNum, XID fbconfigId, + if (!pPixmap) + return BadAlloc; + ++ err = XaceHook(XACE_RESOURCE_ACCESS, client, glxDrawableId, RT_PIXMAP, ++ pPixmap, RT_NONE, NULL, DixCreateAccess); ++ if (err != Success) { ++ (*pGlxScreen->pScreen->DestroyPixmap) (pPixmap); ++ return err; ++ } ++ + /* Assign the pixmap the same id as the pbuffer and add it as a + * resource so it and the DRI2 drawable will be reclaimed when the + * pbuffer is destroyed. */ +-- +GitLab + |