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.
The 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.
| Link | Tags |
|---|---|
| http://www.securityfocus.com/bid/106192 | vdb entry third party advisory |
| https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc | third party advisory vendor advisory |
| http://www.securitytracker.com/id/1042164 | vdb entry third party advisory |
| https://secuniaresearch.flexerasoftware.com/secunia_research/2018-24/ | third party advisory |