CVE-2020-3327 ClamAV ARJ Archive Parsing Denial of Service Vulnerability

What is CVE-2020-3327?

CVE-2020-3327 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 13 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the ARJ archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.102.2 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a heap buffer overflow read. An attacker could exploit this vulnerability by sending a crafted ARJ file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.

Weakness: CWE-20

Which versions are affected by CVE-2020-3327?

It affects 4 products.

Products include Canonical Ubuntu Linux, Cisco Clam Antivirus, Debian Debian Linux, Fedoraproject Fedora.

How do I fix CVE-2020-3327?

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-2020-3327 being exploited?

There is no known exploitation of CVE-2020-3327 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 ALPINE-CVE-2020-3327, CLEANSTART-2026-SG18507, DEBIAN-CVE-2020-3327, GHSA-jgg8-q968-j8hx, UBUNTU-CVE-2020-3327.