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CVE-2015-6835

Date: May 16, 2016

The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.

Language: C

Severity Score

Related Resources (10)

https://access.redhat.com/security/cve/CVE-2015-6835
http://www.securityfocus.com/bid/76734
http://www.debian.org/security/2015/dsa-3358
https://bugs.php.net/bug.php?id=70219
http://www.securitytracker.com/id/1033548
https://nvd.nist.gov/vuln/detail/CVE-2015-6835
http://php.net/ChangeLog-5.php
https://security.gentoo.org/glsa/201606-10
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-6835
https://www.mend.io/vulnerability-database/CVE-2015-6835

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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