Vulnerability Details : CVE-2016-4356
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.
Vulnerability category: OverflowDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2016-4356
Probability of exploitation activity in the next 30 days: 2.25%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 88 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2016-4356
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2016-4356
-
The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-4356
-
http://www.ubuntu.com/usn/USN-2982-1
USN-2982-1: Libksba vulnerabilities | Ubuntu security notices
-
http://www.openwall.com/lists/oss-security/2016/04/29/5
oss-security - CVE request: three issues in libksba
-
https://security.gentoo.org/glsa/201604-04
libksba: Multiple vulnerabilities (GLSA 201604-04) — Gentoo security
-
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=243d12fdec66a4360fbb3e307a046b39b5b4ffc3
git.gnupg.org Git - libksba.git/commit
-
http://www.openwall.com/lists/oss-security/2016/05/10/3
oss-security - Re: Re: CVE request: three issues in libksba
-
http://www.openwall.com/lists/oss-security/2016/04/29/8
oss-security - Re: CVE request: three issues in libksba
Products affected by CVE-2016-4356
- cpe:2.3:a:gnupg:libksba:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*