CVE-2011-1739 Auth bypass in n/a
Remote attackers can bypass NFS access restrictions by exploiting improper CIDR handling in FreeBSD mountd, allowing unauthorized mount requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2011-1739?
CVE-2011-1739 is a medium-severity authentication bypass vulnerability in Freebsd Freebsd, published on 3 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The makemask function in mountd.c in mountd in FreeBSD 7.4 through 8.2 does not properly handle a -network field specifying a CIDR block with a prefix length that is not an integer multiple of 8, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances via an NFS mount request.
Weakness: CWE-20
Which versions are affected by CVE-2011-1739?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2011-1739?
No fix has been published for CVE-2011-1739 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2011-1739 being exploited?
There is no known exploitation of CVE-2011-1739 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-xr9g-g7xh-rw7g.