CVE-2020-3810 Denial of service in apt

What is CVE-2020-3810?

CVE-2020-3810 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 15 May 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

Missing input validation in the ar/tar implementations of APT before version 2.1.2 could result in denial of service when processing specially crafted deb files.

Weakness: CWE-20, CWE-125

Which versions are affected by CVE-2020-3810?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Apt, Debian Debian Linux, Fedoraproject Fedora.

How do I fix CVE-2020-3810?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-3810 being exploited?

There is no known exploitation of CVE-2020-3810 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-2020-3810, DLA-2210-1, DSA-4685-1, GHSA-q2xq-8h7m-vrfm, UBUNTU-CVE-2020-3810, USN-4359-1 and 1 more.