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FreeBSD Security Advisory (FreeBSD-SA-11:01.mountd.asc)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-11:01.mountd.asc
Insight
Insight
The mountd(8) daemon services NFS mount requests from other client machines. When mountd is started, it loads the export host addresses and options into the kernel using the mount(2) system call. While parsing the exports(5) table, a network mask in the form of - network=netname/prefixlength results in an incorrect network mask being computed if the prefix length is not a multiple of 8. For example, specifying the ACL for an export as -network 192.0.2.0/23 would result in a netmask of 255.255.127.0 being used instead of the correct netmask of 255.255.254.0.
Solution
Solution
Upgrade your system to the appropriate stable release or security branch dated after the correction date.