#VU110294 Buffer overflow in PHP - CVE-2010-2191

Vulnerability identifier: #VU110294

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2010-2191

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 5.2, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.2.7, 5.2.8, 5.2.9, 5.2.10, 5.2.11, 5.2.12, 5.2.13, 5.3, 5.3.1, 5.3.2

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.