CVE-2016-4356
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
The append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.3 allows remote attackers to cause a denial of service (out-of-bounds read) by clearing the high bit of the byte after invalid utf-8 encoded data.
Predictions
Exploit likelihood
83%
Patch ETA
—
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
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 1.3.3-1 |
| debian | bullseye | fixed | 1.3.3-1 |
| debian | forky | fixed | 1.3.3-1 |
| debian | sid | fixed | 1.3.3-1 |
| debian | trixie | fixed | 1.3.3-1 |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gnupg | libksba | {"endIncluding":"1.3.2"} | |
References
- https://www.suse.com/security/cve/CVE-2016-4356.html
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=243d12fdec66a4360fbb3e307a046b39b5b4ffc3
- http://www.openwall.com/lists/oss-security/2016/04/29/5
- http://www.openwall.com/lists/oss-security/2016/04/29/8
- http://www.openwall.com/lists/oss-security/2016/05/10/3
- http://www.ubuntu.com/usn/USN-2982-1
- https://security.gentoo.org/glsa/201604-04
- https://security-tracker.debian.org/tracker/CVE-2016-4356
CWEs
CWE-119
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.