CVE-2009-5016

Public Exploit

Description

Integer overflow in the xml_utf8_decode function in ext/xml/xml.c in PHP before 5.2.11 makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string that uses overlong UTF-8 encoding, a different vulnerability than CVE-2010-3870.

Category

6.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 2.98% Top 15%
Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory fedoraproject.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.vupen.com/english/advisories/2011/0077 vdb entry
http://www.securityfocus.com/bid/44889 vdb entry
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html vendor advisory
http://secunia.com/advisories/42812 third party advisory
http://www.redhat.com/support/errata/RHSA-2011-0195.html vendor advisory
http://bugs.php.net/bug.php?id=49687 exploit
http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf exploit
http://www.ubuntu.com/usn/USN-1042-1 vendor advisory
http://www.redhat.com/support/errata/RHSA-2010-0919.html vendor advisory
http://www.vupen.com/english/advisories/2011/0021 vdb entry
http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html exploit
http://secunia.com/advisories/42410 third party advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html vendor advisory
http://www.vupen.com/english/advisories/2011/0020 vdb entry
http://www.vupen.com/english/advisories/2010/3081 vdb entry

Frequently Asked Questions

What is the severity of CVE-2009-5016?
CVE-2009-5016 has been scored as a medium severity vulnerability.
How to fix CVE-2009-5016?
To fix CVE-2009-5016, 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-2009-5016 being actively exploited in the wild?
It is possible that CVE-2009-5016 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.