CVE-2016-4356 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Libksba
Severity
7.5HIGHNVD
EPSS
1.0%
top 23.54%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJun 13
Latest updateMay 13
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages6 packages
Also affects: Ubuntu Linux 12.04, 14.04, 15.10, 16.04
🔴Vulnerability Details
5GHSA▶
GHSA-986h-5j8j-hgfc: Off-by-one error in the append_utf8_value function in the DN decoder (dn↗2022-05-13
OSV
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📋Vendor Advisories
5Debian▶
CVE-2016-4574: libksba - Off-by-one error in the append_utf8_value function in the DN decoder (dn.c) in L...↗2016
Debian▶
CVE-2016-4356: libksba - The append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.3 ...↗2016
Red Hat▶
libksba: encoding of invalid utf-8 strings in DN decoder src/dn.c (append_quoted, append_atv)↗2015-04-08