critical
9.8
CWE
416
Advisory Published
Updated

CVE-2016-6295: Use After Free

First published: Mon Jul 25 2016(Updated: )

ext/snmp/snmp.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly have unspecified other impact via crafted serialized data, a related issue to CVE-2016-5773.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
PHP<7.0.9
7.0.9
PHP<=5.5.37
PHP=5.6.0-alpha1
PHP=5.6.0-alpha2
PHP=5.6.0-alpha3
PHP=5.6.0-alpha4
PHP=5.6.0-alpha5
PHP=5.6.0-beta1
PHP=5.6.0-beta2
PHP=5.6.0-beta3
PHP=5.6.0-beta4
PHP=5.6.1
PHP=5.6.2
PHP=5.6.3
PHP=5.6.4
PHP=5.6.5
PHP=5.6.6
PHP=5.6.7
PHP=5.6.8
PHP=5.6.9
PHP=5.6.10
PHP=5.6.11
PHP=5.6.12
PHP=5.6.13
PHP=5.6.14
PHP=5.6.15
PHP=5.6.16
PHP=5.6.17
PHP=5.6.18
PHP=5.6.19
PHP=5.6.20
PHP=5.6.21
PHP=5.6.22
PHP=5.6.23
PHP=7.0.0
PHP=7.0.1
PHP=7.0.2
PHP=7.0.3
PHP=7.0.4
PHP=7.0.5
PHP=7.0.8

Remedy

http://git.php.net/?p=php-src.git;a=commit;h=cab1c3b3708eead315e033359d07049b23b147a3

Remedy

http://openwall.com/lists/oss-security/2016/07/24/2

Remedy

https://bugs.php.net/72479

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-6295?

    CVE-2016-6295 has been classified as a denial of service vulnerability due to a use-after-free issue that can lead to application crashes.

  • How do I fix CVE-2016-6295?

    To mitigate CVE-2016-6295, upgrade your PHP version to 5.5.38, 5.6.24, or 7.0.9 or later.

  • Which versions of PHP are affected by CVE-2016-6295?

    CVE-2016-6295 affects PHP versions prior to 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9.

  • What types of attacks can result from CVE-2016-6295?

    CVE-2016-6295 can be exploited by remote attackers to cause denial of service through application crashes.

  • Is CVE-2016-6295 exploitable in production environments?

    Yes, CVE-2016-6295 can be exploited in production environments if vulnerable versions of PHP are used.

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