Critical severity · published May 16, 2016
CVE-2015-6835
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…
9.8
CVSS
36.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)36.2% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
PHP · PHP
5.6.0; 5.6.0; 5.6.0; 5.6.0; 5.6.0; 5.6.0; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-6835
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-6835
php.net
http://php.net/ChangeLog-5.php
www.debian.org
http://www.debian.org/security/2015/dsa-3358
www.securityfocus.com
http://www.securityfocus.com/bid/76734
www.securitytracker.com
http://www.securitytracker.com/id/1033548
bugs.php.net
https://bugs.php.net/bug.php?id=70219
security.gentoo.org
https://security.gentoo.org/glsa/201606-10
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