CVE-2019-6977 Memory corruption in n/a

What is CVE-2019-6977?

CVE-2019-6977 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 27 Jan 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

gdImageColorMatch in gd_color_match.c in the GD Graphics Library (aka LibGD) 2.2.5, as used in the imagecolormatch function in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1, has a heap-based buffer overflow. This can be exploited by an attacker who is able to trigger imagecolormatch calls with crafted image data.

Weakness: CWE-787

Which versions are affected by CVE-2019-6977?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Libgd Libgd, Netapp Storage Automation Store, Php Php.

How do I fix CVE-2019-6977?

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-2019-6977 being exploited?

There is no known exploitation of CVE-2019-6977 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.

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 ALPINE-CVE-2019-6977, DEBIAN-CVE-2019-6977, GHSA-3jrx-xgc5-h2f9, SUSE-SU-2019:0449-1, UBUNTU-CVE-2019-6977, openSUSE-SU-2024:11852-1.