Integer overflow in FreeBSD
CVE-2018-17157
In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error when handling opcodes can cause memory corruption by sending a specially crafted NFSv4 request. Unprivileged remote users with access to the NFS server may be able to execute arbitrary code.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.242 (97.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.242 · newest: 0.242 · change: 0.000
Affected products
- FreeBSD — versions 11.2, FreeBSD 11.2 before 11.2-RELEASE-p5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106192 (VDB Entry, Third Party Advisory, vdb-entry)
- secuniaresearch.flexerasoftware.com/secunia_research/2018-25/ (Third Party Advisory)
- security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc (vendor-advisory, Patch, Vendor Advisory)
- www.securitytracker.com/id/1042164 (Patch, VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-17157?
- CVE-2018-17157 is a critical-severity vulnerability in FreeBSD, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2018-12-04.
- How severe is CVE-2018-17157?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-17157 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.