CVE-2017-12933
9.8
CRITICAL · CVSS 3.0 · EPSS 6.9% (pctl 94)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 6.94% — more likely to be exploited than 94% of all CVEs |
| Weakness | CWE-125 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2017-08-18 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| php | php |
References
- http://php.net/ChangeLog-5.php
- http://php.net/ChangeLog-7.php
- http://www.securityfocus.com/bid/99490
- https://access.redhat.com/errata/RHSA-2018:1296
- https://bugs.php.net/bug.php?id=74111
- https://usn.ubuntu.com/3566-1/
- https://usn.ubuntu.com/3566-2/
- https://www.debian.org/security/2018/dsa-4080
- https://www.debian.org/security/2018/dsa-4081
- http://php.net/ChangeLog-5.php
- http://php.net/ChangeLog-7.php
- http://www.securityfocus.com/bid/99490
- https://access.redhat.com/errata/RHSA-2018:1296
- https://bugs.php.net/bug.php?id=74111
- https://usn.ubuntu.com/3566-1/
- https://usn.ubuntu.com/3566-2/
- https://www.debian.org/security/2018/dsa-4080
- https://www.debian.org/security/2018/dsa-4081
→ the Explorer · watch your stack · NVD