CVE-2017-12932
CRITICAL severity · CVSS 9.8 · Use-after-free
9.8CVSS CRITICAL
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)7%
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4 ↗
Additional information
- NVD record
- https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4Patch
- http://php.net/ChangeLog-7.phpAdvisory
- https://bugs.php.net/bug.php?id=74103Advisory
- http://www.securityfocus.com/bid/100427Advisory
- https://access.redhat.com/errata/RHSA-2018:1296
- https://access.redhat.com/errata/RHSA-2019:2519
- https://security.gentoo.org/glsa/201709-21
- https://security.netapp.com/advisory/ntap-20180112-0001/