CVE-2009-4142

Public Exploit

Description

The htmlspecialchars function in PHP before 5.2.12 does not properly handle (1) overlong UTF-8 sequences, (2) invalid Shift_JIS sequences, and (3) invalid EUC-JP sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks by placing a crafted byte sequence before a special character.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 6.81% Top 10%
Vendor Advisory marc.info Vendor Advisory apple.com Vendor Advisory debian.org Vendor Advisory secunia.com Vendor Advisory vupen.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/37389 vdb entry exploit
http://www.php.net/releases/5_2_12.php
http://bugs.php.net/bug.php?id=49785
http://secunia.com/advisories/40262 third party advisory
http://marc.info/?l=bugtraq&m=127680701405735&w=2 vendor advisory
http://securitytracker.com/id?1023372 vdb entry exploit
http://secunia.com/advisories/37821 third party advisory vendor advisory
http://secunia.com/advisories/38648 third party advisory
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html vendor advisory
http://www.php.net/ChangeLog-5.php patch
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7085 vdb entry signature
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10005 vdb entry signature
http://support.apple.com/kb/HT4077
http://www.vupen.com/english/advisories/2009/3593 vdb entry vendor advisory
http://www.debian.org/security/2010/dsa-2001 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2009-4142?
CVE-2009-4142 has been scored as a medium severity vulnerability.
How to fix CVE-2009-4142?
To fix CVE-2009-4142, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-4142 being actively exploited in the wild?
It is possible that CVE-2009-4142 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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