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CVE-2015-6835

Publication date 9 September 2015

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
php5 15.04 vivid
Fixed 5.6.4+dfsg-4ubuntu6.3
14.04 LTS trusty
Fixed 5.5.9+dfsg-1ubuntu4.13
12.04 LTS precise
Fixed 5.3.10-1ubuntu3.20

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-2758-1
    • PHP vulnerabilities
    • 30 September 2015

Other references