Unrated severityNVD Advisory· Published Aug 8, 2006· Updated Jun 16, 2026
CVE-2006-4020
CVE-2006-4020
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
68cpe:2.3:a:php:php:4.0:*:*:*:*:*:*:*+ 67 more
- cpe:2.3:a:php:php:4.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.1:patch1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.1:patch2:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.3:patch1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.4:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.4:patch1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.6:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.7:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.7:rc1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.7:rc2:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0.7:rc3:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:beta_4_patch1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.2.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.2:*:dev:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.10:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.11:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.5:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.6:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.7:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.8:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.3.9:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.4.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:4.4.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:*
- (no CPE)range: <=5.1.4, <=4.4.3
Patches
Vulnerability mechanics
References
39- bugs.php.net/bug.phpnvdExploitPatch
- www.plain-text.info/sscanf_bug.txtnvdExploitURL Repurposed
- www.securityfocus.com/archive/1/442438/30/0/threadednvdExploitPatchVendor Advisory
- patches.sgi.com/support/free/security/advisories/20061001-01-P.ascnvd
- rhn.redhat.com/errata/RHSA-2006-0688.htmlnvd
- rhn.redhat.com/errata/RHSA-2006-0736.htmlnvd
- secunia.com/advisories/21403nvd
- secunia.com/advisories/21467nvd
- secunia.com/advisories/21546nvd
- secunia.com/advisories/21608nvd
- secunia.com/advisories/21683nvd
- secunia.com/advisories/21768nvd
- secunia.com/advisories/21847nvd
- secunia.com/advisories/22004nvd
- secunia.com/advisories/22039nvd
- secunia.com/advisories/22069nvd
- secunia.com/advisories/22440nvd
- secunia.com/advisories/22487nvd
- secunia.com/advisories/22538nvd
- secunia.com/advisories/23247nvd
- security.gentoo.org/glsa/glsa-200608-28.xmlnvd
- securityreason.com/securityalert/1341nvd
- securitytracker.com/idnvd
- support.avaya.com/elmodocs2/security/ASA-2006-221.htmnvd
- support.avaya.com/elmodocs2/security/ASA-2006-222.htmnvd
- support.avaya.com/elmodocs2/security/ASA-2006-223.htmnvd
- www.mandriva.com/security/advisoriesnvd
- www.novell.com/linux/security/advisories/2006_19_sr.htmlnvd
- www.novell.com/linux/security/advisories/2006_20_sr.htmlnvd
- www.novell.com/linux/security/advisories/2006_22_sr.htmlnvd
- www.novell.com/linux/security/advisories/2006_52_php.htmlnvd
- www.php.net/ChangeLog-5.phpnvd
- www.php.net/release_5_1_5.phpnvd
- www.redhat.com/support/errata/RHSA-2006-0669.htmlnvd
- www.redhat.com/support/errata/RHSA-2006-0682.htmlnvd
- www.securityfocus.com/bid/19415nvd
- www.ubuntu.com/usn/usn-342-1nvd
- www.vupen.com/english/advisories/2006/3193nvd
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11062nvd
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