CVE-2018-17156 json
In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwr…
published 2018-11-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8931
- cvss
- 5.9
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.
Patch / fix
- freebsd freebsd 11.2
Exploit prediction
1.63% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- security.freebsd.org https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.asc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Affected products
- FreeBSD FreeBSD
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
security.freebsd.org
/advisories/FreeBSD-EN-18:13.icmp.asc
exploit, mitigation, vendor-advisory
-
securityfocus.com
/bid/106052
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-17156
- NVD CVE-2018-17156
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.