CVE-2006-4020

Public Exploit

Description

scanf.c in PHP 5.1.4 and earlier, and 4.4.3 and earlier, allows context-dependent attackers to execute arbitrary code via a sscanf PHP function call that performs argument swapping, which increments an index past the end of an array and triggers a buffer over-read.

4.6

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 3.88% Top 15%

Vendor Advisory redhat.com Vendor Advisory mandriva.com Vendor Advisory novell.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory novell.com Vendor Advisory redhat.com Vendor Advisory novell.com Vendor Advisory sgi.com Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory novell.com Vendor Advisory securityfocus.com

Affected: n/a n/a

References

Link	Tags
http://securitytracker.com/id?1016984	vdb entry
http://www.plain-text.info/sscanf_bug.txt	exploit url repurposed
http://www.php.net/release_5_1_5.php
http://www.securityfocus.com/bid/19415	vdb entry
http://secunia.com/advisories/21768	third party advisory
http://secunia.com/advisories/21403	third party advisory
http://www.redhat.com/support/errata/RHSA-2006-0669.html	vendor advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2006:144	vendor advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11062	signature vdb entry
http://secunia.com/advisories/21847	third party advisory
http://www.novell.com/linux/security/advisories/2006_20_sr.html	vendor advisory
http://secunia.com/advisories/22487	third party advisory
http://www.ubuntu.com/usn/usn-342-1	vendor advisory
http://support.avaya.com/elmodocs2/security/ASA-2006-221.htm
http://secunia.com/advisories/22039	third party advisory
http://rhn.redhat.com/errata/RHSA-2006-0688.html	vendor advisory
http://bugs.php.net/bug.php?id=38322	patch exploit
http://secunia.com/advisories/21683	third party advisory
http://secunia.com/advisories/23247	third party advisory
http://secunia.com/advisories/21467	third party advisory
http://www.novell.com/linux/security/advisories/2006_19_sr.html	vendor advisory
http://secunia.com/advisories/22004	third party advisory
http://support.avaya.com/elmodocs2/security/ASA-2006-222.htm
http://secunia.com/advisories/22538	third party advisory
http://www.redhat.com/support/errata/RHSA-2006-0682.html	vendor advisory
http://secunia.com/advisories/21546	third party advisory
http://secunia.com/advisories/21608	third party advisory
http://secunia.com/advisories/22440	third party advisory
http://secunia.com/advisories/22069	third party advisory
http://www.securityfocus.com/archive/1/442438/30/0/threaded	patch vendor advisory mailing list exploit
http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
http://www.novell.com/linux/security/advisories/2006_22_sr.html	vendor advisory
http://www.vupen.com/english/advisories/2006/3193	vdb entry
http://www.php.net/ChangeLog-5.php#5.1.5
ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc	vendor advisory
http://security.gentoo.org/glsa/glsa-200608-28.xml	vendor advisory
http://securityreason.com/securityalert/1341	third party advisory
http://rhn.redhat.com/errata/RHSA-2006-0736.html	vendor advisory
http://www.novell.com/linux/security/advisories/2006_52_php.html	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2006-4020?: CVE-2006-4020 has been scored as a medium severity vulnerability.
How to fix CVE-2006-4020?: To fix CVE-2006-4020, 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-2006-4020 being actively exploited in the wild?: It is possible that CVE-2006-4020 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.