CVE-2018-17158: freebsd Integer Overflow or Wraparound

Vulnerability summary

CVE-2018-17158 is a high (CVSS 7.8) Integer Overflow or Wraparound vulnerability in freebsd. EPSS estimates a 4.41% chance of exploitation in the next 30 days, higher than 91.2% of scored vulnerabilities.

Timeline

1. 04-12-2018
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error can occur when handling the client address length field in an NFSv4 request. Unprivileged remote users with access to the NFS server can crash the system by sending a specially crafted NFSv4 request.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.