CVE-2020-1752 Use after free in glibc

What is CVE-2020-1752?

CVE-2020-1752 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 30 Apr 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

Weakness: CWE-416

Which versions are affected by CVE-2020-1752?

It affects 8 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Gnu Glibc, Netapp Active Iq Unified Manager, Netapp H410c Firmware, Netapp Hci Management Node and 2 more.

How do I fix CVE-2020-1752?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-1752 being exploited?

There is no known exploitation of CVE-2020-1752 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 CLSA-2025-1758704869, CLSA-2025-1758711950, DEBIAN-CVE-2020-1752, GHSA-8x3m-4qgh-829r, SUSE-SU-2020:0820-1, SUSE-SU-2022:1123-1 and 2 more.