Detections
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RHEL 6 : cifs-utils (RHSA-2012:0902)
low Nessus Plugin ID 59596
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Synopsis
The remote Red Hat host is missing a security update.Description
The remote Redhat Enterprise Linux 6 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2012:0902 advisory.The cifs-utils package contains tools for mounting and managing shares on Linux using the SMB/CIFS protocol. The CIFS shares can be used as standard Linux file systems.
A file existence disclosure flaw was found in mount.cifs. If the tool was installed with the setuid bit set, a local attacker could use this flaw to determine the existence of files or directories in directories not accessible to the attacker. (CVE-2012-1586)
Note: mount.cifs from the cifs-utils package distributed by Red Hat does not have the setuid bit set. We recommend that administrators do not manually set the setuid bit for mount.cifs.
This update also fixes the following bugs:
* The cifs.mount(8) manual page was previously missing documentation for several mount options. With this update, the missing entries have been added to the manual page. (BZ#769923)
* Previously, the mount.cifs utility did not properly update the /etc/mtab system information file when remounting an existing CIFS mount. Consequently, mount.cifs created a duplicate entry of the existing mount entry. This update adds the del_mtab() function to cifs.mount, which ensures that the old mount entry is removed from /etc/mtab before adding the updated mount entry. (BZ#770004)
* The mount.cifs utility did not properly convert user and group names to numeric UIDs and GIDs. Therefore, when the uid, gid or cruid mount options were specified with user or group names, CIFS shares were mounted with default values. This caused shares to be inaccessible to the intended users because UID and GID is set to 0 by default. With this update, user and group names are properly converted so that CIFS shares are now mounted with specified user and group ownership as expected. (BZ#796463)
* The cifs.upcall utility did not respect the domain_realm section in the krb5.conf file and worked only with the default domain.
Consequently, an attempt to mount a CIFS share from a different than the default domain failed with the following error message:
mount error(126): Required key not available
This update modifies the underlying code so that cifs.upcall handles multiple Kerberos domains correctly and CIFS shares can now be mounted as expected in a multi-domain environment. (BZ#805490)
In addition, this update adds the following enhancements:
* The cifs.upcall utility previously always used the /etc/krb5.conf file regardless of whether the user had specified a custom Kerberos configuration file. This update adds the --krb5conf option to cifs.upcall allowing the administrator to specify an alternate krb5.conf file. For more information on this option, refer to the cifs.upcall(8) manual page. (BZ#748756)
* The cifs.upcall utility did not optimally determine the correct service principal name (SPN) used for Kerberos authentication, which occasionally caused krb5 authentication to fail when mounting a server's unqualified domain name. This update improves cifs.upcall so that the method used to determine the SPN is now more versatile. (BZ#748757)
* This update adds the backupuid and backupgid mount options to the mount.cifs utility. When specified, these options grant a user or a group the right to access files with the backup intent. For more information on these options, refer to the mount.cifs(8) manual page. (BZ#806337)
All users of cifs-utils are advised to upgrade to this updated package, which contains backported patches to fix these issues and add these enhancements.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected cifs-utils package.See Also
http://www.nessus.org/u?a273a087
https://access.redhat.com/errata/RHSA-2012:0902
https://access.redhat.com/security/updates/classification/#low
https://bugzilla.redhat.com/show_bug.cgi?id=748756
Plugin Details
Severity: Low
ID: 59596
File Name: redhat-RHSA-2012-0902.nasl
Version: 1.21
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 6/20/2012
Updated: 4/15/2025
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.2
Vendor
Vendor Severity: Low
CVSS v2
Risk Factor: Low
Base Score: 2.1
Temporal Score: 1.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2012-1586
CVSS v3
Risk Factor: Low
Base Score: 3.3
Temporal Score: 3
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:cifs-utils
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 6/20/2012
Vulnerability Publication Date: 8/27/2012
Reference Information
CVE: CVE-2012-1586
RHSA: 2012:0902