SB2011041002 - Multiple vulnerabilities in kernel Util-linux

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2011-1677)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

mount in util-linux 2.19 and earlier does not remove the /etc/mtab~ lock file after a failed attempt to add a mount entry, which has unspecified impact and local attack vectors.

2) Resource management error (CVE-ID: CVE-2011-1675)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

mount in util-linux 2.19 and earlier attempts to append to the /etc/mtab.tmp file without first checking whether resource limits would interfere, which allows local users to trigger corruption of the /etc/mtab file via a process with a small RLIMIT_FSIZE value, a related issue to CVE-2011-1089.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2011-1676)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

mount in util-linux 2.19 and earlier does not remove the /etc/mtab.tmp file after a failed attempt to add a mount entry, which allows local users to trigger corruption of the /etc/mtab file via multiple invocations.

Remediation

Install update from vendor's website.

References

• http://openwall.com/lists/oss-security/2011/03/04/10
• http://openwall.com/lists/oss-security/2011/03/04/11
• http://openwall.com/lists/oss-security/2011/03/04/12
• http://openwall.com/lists/oss-security/2011/03/04/9
• http://openwall.com/lists/oss-security/2011/03/05/3
• http://openwall.com/lists/oss-security/2011/03/05/7
• http://openwall.com/lists/oss-security/2011/03/07/9
• http://openwall.com/lists/oss-security/2011/03/14/16
• http://openwall.com/lists/oss-security/2011/03/14/5
• http://openwall.com/lists/oss-security/2011/03/14/7
• http://openwall.com/lists/oss-security/2011/03/15/6
• http://openwall.com/lists/oss-security/2011/03/22/4
• http://openwall.com/lists/oss-security/2011/03/22/6
• http://openwall.com/lists/oss-security/2011/03/31/3
• http://openwall.com/lists/oss-security/2011/03/31/4
• http://openwall.com/lists/oss-security/2011/04/01/2
• http://secunia.com/advisories/48114
• http://www.redhat.com/support/errata/RHSA-2011-1691.html
• https://bugzilla.redhat.com/show_bug.cgi?id=688980
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66703
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66705
• https://exchange.xforce.ibmcloud.com/vulnerabilities/66704