This email announces a reissue of the nfs-utils package due to a bug in the build environment. Users experiencing issues with umount.nfs can correct the error by downgrading nfs-utils to the previous version (yum downgrade nfs-utils), cleaning their repodata (yum clean all), and updating nfs-utils again (yum update nfs-utils). All Scientific Linux mirrors will acquire this update at their next sync. ------- Synopsis: Low: nfs-utils security, bug fix, and enhancement update Issue Date: 2011-12-06 CVE Numbers: CVE-2011-1749 CVE-2011-2500 The nfs-utils packages provide a daemon for the kernel Network File System (NFS) server, and related tools such as the mount.nfs, umount.nfs, and showmount programs. A flaw was found in the way nfs-utils performed IP based authentication of mount requests. In configurations where a directory was exported to a group of systems using a DNS wildcard or NIS (Network Information Service) netgroup, an attacker could possibly gain access to other directories exported to a specific host or subnet, bypassing intended access restrictions. (CVE-2011-2500) It was found that the mount.nfs tool did not handle certain errors correctly when updating the mtab (mounted file systems table) file. A local attacker could use this flaw to corrupt the mtab file. (CVE-2011-1749) This update also fixes several bugs and adds an enhancement. Users of nfs-utils are advised to upgrade to these updated packages, which contain backported patches to resolve these issues and add this enhancement. After installing this update, the nfs service will be restarted automatically. SL6: i386 nfs-utils-1.2.3-15.el6.i686.rpm nfs-utils-debuginfo-1.2.3-15.el6.i686.rpm x86_64 nfs-utils-1.2.3-15.el6.x86_64.rpm nfs-utils-debuginfo-1.2.3-15.el6.x86_64.rpm - Scientific Linux Development Team