CVE-2017-12932
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.42% probability · 94th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- php/php
- Source
- cve@mitre.org
References
- http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
- http://www.securityfocus.com/bid/100427Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1296
- https://access.redhat.com/errata/RHSA-2019:2519
- https://bugs.php.net/bug.php?id=74103Issue Tracking, Vendor Advisory
- https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201709-21
- https://security.netapp.com/advisory/ntap-20180112-0001/
- https://www.debian.org/security/2018/dsa-4080
- http://php.net/ChangeLog-7.phpRelease Notes, Vendor Advisory
- http://www.securityfocus.com/bid/100427Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1296
- https://access.redhat.com/errata/RHSA-2019:2519
- https://bugs.php.net/bug.php?id=74103Issue Tracking, Vendor Advisory
- https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201709-21
- https://security.netapp.com/advisory/ntap-20180112-0001/
- https://www.debian.org/security/2018/dsa-4080
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.