CVE-2016-4356 Memory corruption in n/a

What is CVE-2016-4356?

CVE-2016-4356 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 13 Jun 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-119

Which versions are affected by CVE-2016-4356?

It affects 2 products.

Products include Canonical Ubuntu Linux, Gnupg Libksba.

How do I fix CVE-2016-4356?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2016-4356 being exploited?

There is no known exploitation of CVE-2016-4356 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-4356, GHSA-mhm6-qhc6-f9f7, UBUNTU-CVE-2016-4356.