CVE-2020-1751 Memory corruption in glibc

What is CVE-2020-1751?

CVE-2020-1751 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 17 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the frame address, resulting in a denial of service or potential code execution. The highest threat from this vulnerability is to system availability.

Weakness: CWE-787

Which versions are affected by CVE-2020-1751?

It affects 3 products.

Products include Canonical Ubuntu Linux, Gnu Glibc, Redhat Enterprise Linux.

How do I fix CVE-2020-1751?

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-2020-1751 being exploited?

There is no known exploitation of CVE-2020-1751 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-2020-1751, GHSA-22j8-wpwh-4rrr, UBUNTU-CVE-2020-1751.