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    CVE-2006-1991

    The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.

    Published:Apr 24, 2006
    Last Modified:Apr 16, 2026
    EPS:Apr 24, 2006
    EPSS Score:0.03647
    CVSS Score:6.4

    Affected Products

    Vendor
    Php
    Product
    Php

    Exploits

    http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-14355 (CVSS 5.6) — In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.5.8, the AES-WRA…
    CVE-2026-7263 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data in…
    CVE-2026-6104 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL b…
    CVE-2026-7258 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some fu…
    CVE-2026-6722 (CVSS 9.5) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the SOA…
    CVE-2026-7259 (CVSS 2.1) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a misma…
    CVE-2026-7261 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when So…
    CVE-2026-7262 (CVSS 2.9) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when a …
    CVE-2025-14179 (CVSS 7.4) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the PDO…
    CVE-2026-7568 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the met…

    References

    http://secunia.com/advisories/20052
    http://secunia.com/advisories/20269
    http://secunia.com/advisories/20676
    http://secunia.com/advisories/21125
    http://security.gentoo.org/glsa/glsa-200605-08.xml
    http://securitytracker.com/id?1015979
    http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:091
    http://www.novell.com/linux/security/advisories/2006_31_php.html
    http://www.ubuntu.com/usn/usn-320-1
    http://www.vupen.com/english/advisories/2006/1500
    https://exchange.xforce.ibmcloud.com/vulnerabilities/26003
    http://secunia.com/advisories/20052
    http://secunia.com/advisories/20269
    http://secunia.com/advisories/20676
    http://secunia.com/advisories/21125
    http://security.gentoo.org/glsa/glsa-200605-08.xml
    http://securitytracker.com/id?1015979
    http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:091
    http://www.novell.com/linux/security/advisories/2006_31_php.html
    http://www.ubuntu.com/usn/usn-320-1
    http://www.vupen.com/english/advisories/2006/1500
    https://exchange.xforce.ibmcloud.com/vulnerabilities/26003

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High