CVE-2017-5340
CRITICAL severity · CVSS 9.8 · Integer overflow
9.8CVSS CRITICAL
Summary
Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)17%
CVSS:3.1/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/4cc0286f2f3780abc6084bcdae5dce595daa3c12 ↗
Additional information
- NVD record
- https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12Patch
- https://bugs.php.net/bug.php?id=73832Advisory
- http://www.securityfocus.com/bid/95371Advisory
- http://www.securitytracker.com/id/1037659Advisory
- https://access.redhat.com/errata/RHSA-2018:1296Advisory
- https://security.netapp.com/advisory/ntap-20180112-0001/Advisory