Public Date:
716949: CVE-2011-2500 nfs-utils: Improper authentication of an incoming request when an IP based authentication used

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-2500 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of nfs-utils as shipped with Red Hat Enterprise Linux 4 and 5. The Red Hat Security Response Team has rated this issue as having low security impact&#59; a future update in Red Hat Enterprise Linux 6 may address this flaw.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 3.2
Base Metrics AV:A/AC:H/Au:N/C:P/I:P/A:N
Access Vector Adjacent Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (nfs-utils) RHSA-2011:1534 2011-12-05

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 4 nfs-utils Not affected
Red Hat Enterprise Linux 5 nfs-utils Not affected