#VU45186 Input validation error in PHP - CVE-2011-1467

Vulnerability identifier: #VU45186

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2011-1467

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Unspecified vulnerability in the NumberFormatter::setSymbol (aka numfmt_set_symbol) function in the Intl extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (application crash) via an invalid argument, a related issue to CVE-2010-4409.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 1.0, 2.0b10, 2.0, 3.0 - 3.0.18, 4.0 - 4.0.7, 4.1.0 - 4.1.2, 4.2.0 - 4.2.3, 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.4

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External links
https://bugs.php.net/bug.php?id=53512
https://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
https://support.apple.com/kb/HT5002
https://www.mandriva.com/security/advisories?name=MDVSA-2011:052
https://www.mandriva.com/security/advisories?name=MDVSA-2011:053
https://www.php.net/ChangeLog-5.php
https://www.securityfocus.com/bid/46968
https://www.vupen.com/english/advisories/2011/0744

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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. However, proof of concept for this vulnerability is available.