CVE-2010-2094: Medium severity PHP PHP vulnerability

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-2094 to the following vulnerability:

Multiple format string vulnerabilities in the phar extension in PHP 5.3 before 5.3.2 allow 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 (1) pharstreamflush, (2) pharwrapperunlink, (3) pharparseurl, or (4) pharwrapperopenurl functions in ext/phar/stream.c; and the (5) pharwrapperopendir function in ext/phar/dirstream.c, which triggers errors in the phpstreamwrapperlogerror function.

References: [1] http://php-security.org/2010/05/14/mops-2010-024-php-pharstreamflush-format-string-vulnerability/index.html [2] http://php-security.org/2010/05/14/mops-2010-025-php-pharwrapperopendir-format-string-vulnerability/index.html [3] http://php-security.org/2010/05/14/mops-2010-026-php-pharwrapperunlink-format-string-vulnerability/index.html [4] http://php-security.org/2010/05/14/mops-2010-027-php-pharparseurl-format-string-vulnerabilities/index.html [5] http://php-security.org/2010/05/14/mops-2010-028-php-pharwrapperopenurl-format-string-vulnerabilities/index.html

Public PoC (from [1]):

$ php -r "fopen('phar:///usr/bin/phar.phar/%08x-%08x-%08x-%08x-%08x-%08x-%08x-%08x-%08x','r');"

Credit: All flaws discovered by Stefan Esser.