critical
9.8
CWE
416
Advisory Published
Updated

CVE-2017-12932: Use After Free

First published: Fri Aug 18 2017(Updated: )

ext/standard/var_unserializer.re in PHP 7.0.x through 7.0.22 and 7.1.x through 7.1.8 is prone to a heap use after free while unserializing untrusted data, related to improper use of the hash API for key deletion in a situation with an invalid array size. Exploitation of this issue can have an unspecified impact on the integrity of PHP. Upstream patch: <a href="https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4">https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4</a> Upstream bug: <a href="https://bugs.php.net/bug.php?id=74103">https://bugs.php.net/bug.php?id=74103</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/php7.0
debian/php7.1
redhat/php<7.0.23
7.0.23
redhat/php<7.1.9
7.1.9
redhat/php<7.2.0
7.2.0
PHP<7.0.23
7.0.23
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=7.0.6
PHP=7.0.7
PHP=7.0.8
PHP=7.0.9
PHP=7.0.10
PHP=7.0.11
PHP=7.0.12
PHP=7.0.13
PHP=7.0.14
PHP=7.0.15
PHP=7.0.16
PHP=7.0.17
PHP=7.0.18
PHP=7.0.19
PHP=7.0.20
PHP=7.0.21
PHP=7.0.22
PHP=7.1.0
PHP=7.1.1
PHP=7.1.2
PHP=7.1.3
PHP=7.1.4
PHP=7.1.5
PHP=7.1.6
PHP=7.1.7
PHP=7.1.8

Remedy

https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-12932?

    CVE-2017-12932 is classified as a high severity vulnerability due to its potential for exploitation in PHP versions 7.0.x up to 7.0.22 and 7.1.x up to 7.1.8.

  • How do I fix CVE-2017-12932?

    To remediate CVE-2017-12932, upgrade PHP to version 7.0.23 or later for 7.0.x and to version 7.1.9 or later for 7.1.x.

  • What vulnerabilities are linked to CVE-2017-12932?

    CVE-2017-12932 is specifically related to a heap use after free vulnerability during the unserialization of untrusted data in specific PHP versions.

  • Which PHP versions are affected by CVE-2017-12932?

    CVE-2017-12932 affects PHP versions 7.0.0 to 7.0.22 and 7.1.0 to 7.1.8.

  • Is CVE-2017-12932 a remote code execution vulnerability?

    CVE-2017-12932 can lead to various exploitations including potential remote code execution if successful.

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