CVE-2017-12933
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 6.94% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 93.8% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-08-18 03:00Z9 YR AGO
- Last updated
- 2024-08-05 18:51Z2 YR AGO
- Reserved
- 2017-08-17
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 01370cd8b562a224848766c18a5d5e5da08ec4c9c8d56f6cd8d5beecccc9db89
05 Affected products
06 References
- access.redhat.comRHSA-2018:1296https://access.redhat.com/errata/RHSA-2018:1296
- php.nethttp://php.net/ChangeLog-5.php
- bugs.php.nethttps://bugs.php.net/bug.php?id=74111
- www.debian.orgDSA-4081https://www.debian.org/security/2018/dsa-4081
- www.debian.orgDSA-4080https://www.debian.org/security/2018/dsa-4080
- usn.ubuntu.comUSN-3566-1https://usn.ubuntu.com/3566-1/
- php.nethttp://php.net/ChangeLog-7.php
- www.securityfocus.com99490http://www.securityfocus.com/bid/99490
- usn.ubuntu.comUSN-3566-2https://usn.ubuntu.com/3566-2/
07 Fixed in
Ubuntu 14.04 LTS
- php5 Fixed in 5.5.9+dfsg-1ubuntu4.23
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.