CVE-2023-1326 local privilege escalation in apport-cli

What is CVE-2023-1326?

CVE-2023-1326 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 13 Apr 2023. 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 privilege escalation attack was found in apport-cli 2.26.0 and earlier which is similar to CVE-2023-26604. If a system is specially configured to allow unprivileged users to run sudo apport-cli, less is configured as the pager, and the terminal size can be set: a local attacker can escalate privilege. It is extremely unlikely that a system administrator would configure sudo to allow unprivileged users to perform this class of exploit.

Weakness: CWE-269

Which versions are affected by CVE-2023-1326?

It affects 2 products.

Products include Canonical Apport, Canonical Ubuntu Linux.

How do I fix CVE-2023-1326?

Apply the vendor's patch.

Is CVE-2023-1326 being exploited?

There is no known exploitation of CVE-2023-1326 in the wild and no public exploit code.

Public exploit code: 5 proofs of concept on GitHub.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2021-25682 apport improperly parses /proc/pid/status High 8.8
• CVE-2021-25683 apport improperly parses /proc/pid/stat High 8.8
• CVE-2021-25684 apport can be stalled by reading a FIFO High 8.8
• CVE-2021-3899 Race condition in Apport High 7.8
• CVE-2022-1242 Other in Apport High 7.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as GHSA-qgrc-7333-5cgx, UBUNTU-CVE-2023-1326, USN-6018-1.