NFS: FreeBSD NFS Server nfsrvd_readdirplus Denial-of-Service
This signature detects attempts to exploit a known vulnerability against FreeBSD NFS Server. A successful attack can result in a denial-of-service condition.
Extended Description
In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, the NFS server lacks a bounds check in the READDIRPLUS NFS request. Unprivileged remote users with access to the NFS server can cause a resource exhaustion by forcing the server to allocate an arbitrarily large memory allocation.
Affected Products
Freebsd freebsd
Short Name
NFS:FREEBSD-NFS-READDIRPLUS-DOS
Severity
Major
Recommended
True
Recommended Action
None
Category
NFS
Keywords
CVE-2018-17159 Denial-of-Service FreeBSD NFS Server bid:106192 nfsrvd_readdirplus
Release Date
06/20/2019
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3427
Port
TCP/2049
False Positive
Rarely
Vendors
Freebsd
CVSS Score
7.8