CVE-2016-4997 Integer overflow in n/a

What is CVE-2016-4997?

CVE-2016-4997 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Jul 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter subsystem in the Linux kernel before 4.6.3 allow local users to gain privileges or cause a denial of service (memory corruption) by leveraging in-container root access to provide a crafted offset value that triggers an unintended decrement.

Weakness: CWE-264

Which versions are affected by CVE-2016-4997?

It affects 11 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Novell Suse Linux Enterprise Desktop, Novell Suse Linux Enterprise Live Patching, Novell Suse Linux Enterprise Module for Public Cloud and 5 more.

How do I fix CVE-2016-4997?

Apply the vendor's patch.

Is CVE-2016-4997 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-4997 exists.

Public exploit code: 1 Metasploit module and 2 Exploit-DB entries.

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-2016-4997, GHSA-qc28-hwmc-pw94, SUSE-SU-2016:1709-1, SUSE-SU-2016:1710-1, UBUNTU-CVE-2016-4997.