CVE-2014-6053
Description
The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Ubuntu Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 14.04 | Affected | — |
| 12.04 | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.9.9+dfsg-6.1 |
| sid | Fixed | 0.9.9+dfsg-6.1 |
| forky | Fixed | 0.9.9+dfsg-6.1 |
| bullseye | Fixed | 0.9.9+dfsg-6.1 |
| bookworm | Fixed | 0.9.9+dfsg-6.1 |
| 7.0 | Affected | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| libvncserver | libvncserver | {"endIncluding":"0.9.9"} | |
References
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
- http://seclists.org/oss-sec/2014/q3/639
- http://secunia.com/advisories/61506
- http://secunia.com/advisories/61682
- http://ubuntu.com/usn/usn-2365-1
- http://www.debian.org/security/2014/dsa-3081
- http://www.ocert.org/advisories/ocert-2014-007.html
- http://www.openwall.com/lists/oss-security/2014/09/25/11
- https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
- https://security.gentoo.org/glsa/201507-07
- https://usn.ubuntu.com/4573-1/
- https://usn.ubuntu.com/4587-1/
- https://security-tracker.debian.org/tracker/CVE-2014-6053
CWEs
CWE-19
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.