Permissions, Privileges, and Access Controls in nfs-utils - CVE-2011-2500
Published: February 15, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU42033
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-2500
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: nfs.sourceforge.net
Affected software:
nfs-utils
nfs-utils
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The host_reliable_addrinfo function in support/export/hostname.c in nfs-utils before 1.2.4 does not properly use DNS to verify access to NFS exports, which allows remote attackers to mount filesystems by establishing crafted DNS A and PTR records.
How to mitigate CVE-2011-2500
Install update from vendor's website.
Sources
- http://marc.info/?l=linux-nfs&m=130875695821953&w=2
- http://rhn.redhat.com/errata/RHSA-2011-1534.html
- http://sourceforge.net/projects/nfs/files/nfs-utils/1.2.4/
- http://sourceforge.net/projects/nfs/files/nfs-utils/1.2.4/Changelog-nfs-utils-1.2.4/download
- https://bugzilla.redhat.com/show_bug.cgi?id=716949