CVE-2016-4356

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-06-13 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04
GnuPG Libksba: through 1.3.2

References

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
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

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