The vrend_decode_reset function in vrend_decode.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (NULL pointer dereference and QEMU process crash) by destroying context 0 (zero).
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Virglrenderer | Virglrenderer_project | * | 0.5.0 (including) |
| Virglrenderer | Ubuntu | artful | * |
| Virglrenderer | Ubuntu | upstream | * |
| Virglrenderer | Ubuntu | yakkety | * |
| Virglrenderer | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.openwall.com/lists/oss-security/2017/02/23/21
- http://www.securityfocus.com/bid/96439
- https://bugzilla.redhat.com/show_bug.cgi?id=1426170
- https://cgit.freedesktop.org/virglrenderer/commit/?id=0a5dff15912207b83018485f83e067474e818bab
- https://lists.freedesktop.org/archives/virglrenderer-devel/2017-February/000145.html
- https://security.gentoo.org/glsa/201707-06
- http://www.openwall.com/lists/oss-security/2017/02/23/21
- http://www.securityfocus.com/bid/96439
- https://bugzilla.redhat.com/show_bug.cgi?id=1426170
- https://cgit.freedesktop.org/virglrenderer/commit/?id=0a5dff15912207b83018485f83e067474e818bab
- https://lists.freedesktop.org/archives/virglrenderer-devel/2017-February/000145.html
- https://security.gentoo.org/glsa/201707-06