medium
4.3
CWE
362
Advisory Published
Updated

CVE-2011-0753: Race Condition

First published: Wed Feb 02 2011(Updated: )

Race condition in the PCNTL extension in PHP before 5.3.4, when a user-defined signal handler exists, might allow context-dependent attackers to cause a denial of service (memory corruption) via a large number of concurrent signals.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
PHP<=5.3.3
PHP=1.0
PHP=2.0
PHP=2.0b10
PHP=3.0
PHP=3.0.1
PHP=3.0.2
PHP=3.0.3
PHP=3.0.4
PHP=3.0.5
PHP=3.0.6
PHP=3.0.7
PHP=3.0.8
PHP=3.0.9
PHP=3.0.10
PHP=3.0.11
PHP=3.0.12
PHP=3.0.13
PHP=3.0.14
PHP=3.0.15
PHP=3.0.16
PHP=3.0.17
PHP=3.0.18
PHP=4.0
PHP=4.0-beta_4_patch1
PHP=4.0-beta1
PHP=4.0-beta2
PHP=4.0-beta3
PHP=4.0-beta4
PHP=4.0.0
PHP=4.0.1
PHP=4.0.2
PHP=4.0.3
PHP=4.0.4
PHP=4.0.5
PHP=4.0.6
PHP=4.0.7
PHP=4.1.0
PHP=4.1.1
PHP=4.1.2
PHP=4.2.0
PHP=4.2.1
PHP=4.2.2
PHP=4.2.3
PHP=4.3.0
PHP=4.3.1
PHP=4.3.2
PHP=4.3.3
PHP=4.3.4
PHP=4.3.5
PHP=4.3.6
PHP=4.3.7
PHP=4.3.8
PHP=4.3.9
PHP=4.3.10
PHP=4.3.11
PHP=4.4.0
PHP=4.4.1
PHP=4.4.2
PHP=4.4.3
PHP=4.4.4
PHP=4.4.5
PHP=4.4.6
PHP=4.4.7
PHP=4.4.8
PHP=4.4.9
PHP=5.3.0
PHP=5.3.1
PHP=5.3.2

Remedy

http://bugs.php.net/52784

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-0753?

    The severity of CVE-2011-0753 is classified as high due to the potential for denial of service and memory corruption.

  • How do I fix CVE-2011-0753?

    To fix CVE-2011-0753, upgrade your PHP installation to version 5.3.4 or later.

  • Who is affected by CVE-2011-0753?

    CVE-2011-0753 affects users of PHP versions prior to 5.3.4 that utilize the PCNTL extension and user-defined signal handlers.

  • What attack vectors exist for CVE-2011-0753?

    CVE-2011-0753 allows context-dependent attackers to exploit the race condition through a large number of concurrent signals.

  • What are the implications of CVE-2011-0753?

    The implications of CVE-2011-0753 include the potential for application crashes and instability, leading to denial of service.

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