Format string error in PHP - CVE-2010-2950
Published: May 4, 2011 / Updated: June 8, 2025
Vulnerability identifier: #VU110286
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2010-2950
CWE-ID: CWE-134
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Affected software
PHP
Gentoo Linux
dev-lang/php
Gentoo Linux
dev-lang/php
How to mitigate CVE-2010-2950
Install update from vendor's website.
PHP - update to 5.3.4
dev-lang/php - update to 5.3.8
dev-lang/php - update to 5.3.8
External References
- http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
- 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://security-tracker.debian.org/tracker/CVE-2010-2950
- http://support.apple.com/kb/HT4581
- http://svn.php.net/viewvc?view=revision&revision=302565
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:254
- http://www.php.net/archive/2010.php#id2010-12-10-1
- http://www.php.net/ChangeLog-5.php
- http://www.php.net/releases/5_3_4.php
- https://bugzilla.redhat.com/show_bug.cgi?id=598537