CVE-2016-9942
critical
CVSS v3
9.8
CVSS v2
7.5
VIR risk
9.8
Description
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Predictions
Exploit likelihood
97%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-9942
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-9942.html
Vendor advisory: arch — https://security.archlinux.org/ASA-201701-20
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.9.11-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 0.9.11+dfsg-1 |
| debian | bullseye | fixed | 0.9.11+dfsg-1 |
| debian | forky | fixed | 0.9.11+dfsg-1 |
| debian | sid | fixed | 0.9.11+dfsg-1 |
| debian | trixie | fixed | 0.9.11+dfsg-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| libvncserver_project | libvncserver | 0.9.10 | |
References
- https://security.archlinux.org/ASA-201701-20
- http://www.debian.org/security/2017/dsa-3753
- http://www.securityfocus.com/bid/95170
- https://github.com/LibVNC/libvncserver/pull/137
- https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://security.gentoo.org/glsa/201702-24
- https://usn.ubuntu.com/4587-1/
- https://www.suse.com/security/cve/CVE-2016-9942.html
- https://security-tracker.debian.org/tracker/CVE-2016-9942
CWEs
CWE-119
Verify integrity in audit chain (admin only). AS-IS.