Prototype Pollution in phpBB
CVE-2018-19274
Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Injection by employing Phar deserialization when an attacker has access to the Admin Control Panel with founder permissions.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.052 (92.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.052 · newest: 0.052 · change: 0.000
Affected products
- phpBB
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.ripstech.com/2018/phpbb3-phar-deserialization-to-remote-code-execution/ (Exploit, Third Party Advisory)
- www.phpbb.com/community/viewtopic.php (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2018/11/msg00029.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-19274?
- CVE-2018-19274 is a high-severity vulnerability in phpBB, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2018-11-17.
- How severe is CVE-2018-19274?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2018-19274 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.