CVE-2018-17157: freebsd Integer Overflow or Wraparound

Vulnerability summary

CVE-2018-17157 is a high (CVSS 10.0) Integer Overflow or Wraparound vulnerability in freebsd. EPSS estimates a 24.17% chance of exploitation in the next 30 days, higher than 97.8% 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 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.

• 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.