Improper input validation in OpenBSD
CVE-2016-6239
The mmap extension __MAP_NOFAULT in OpenBSD 5.8 and 5.9 allows attackers to cause a denial of service (kernel panic and crash) via a large size value.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- OpenBSD — versions 5.8, 5.9
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1036318 (vdb-entry)
- www.openbsd.org/errata59.html (Release Notes)
- www.openwall.com/lists/oss-security/2016/07/14/5 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/07/17/7 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- www.openbsd.org/errata58.html (Release Notes)
- www.securityfocus.com/bid/91805 (vdb-entry)
Frequently asked questions
- What is CVE-2016-6239?
- CVE-2016-6239 is a medium-severity vulnerability in OpenBSD, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2017-03-07.
- How severe is CVE-2016-6239?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2016-6239 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.