CVE-2017-12933
CRITICAL severity · CVSS 9.8 · Out-of-bounds read
9.8CVSS CRITICAL
Summary
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. 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)13%
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.
Additional information
- NVD record
- http://php.net/ChangeLog-5.phpAdvisory
- http://php.net/ChangeLog-7.phpAdvisory
- https://bugs.php.net/bug.php?id=74111Advisory
- http://www.securityfocus.com/bid/99490Advisory
- https://access.redhat.com/errata/RHSA-2018:1296
- https://usn.ubuntu.com/3566-1/
- https://usn.ubuntu.com/3566-2/
- https://www.debian.org/security/2018/dsa-4080