RHEL 5 : glibc (RHSA-2011:0412)

High Nessus Plugin ID 53291

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated glibc packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The glibc packages contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.

The fix for CVE-2010-3847 introduced a regression in the way the dynamic loader expanded the $ORIGIN dynamic string token specified in the RPATH and RUNPATH entries in the ELF library header. A local attacker could use this flaw to escalate their privileges via a setuid or setgid program using such a library. (CVE-2011-0536)

It was discovered that the glibc addmntent() function did not sanitize its input properly. A local attacker could possibly use this flaw to inject malformed lines into /etc/mtab via certain setuid mount helpers, if the attacker were allowed to mount to an arbitrary directory under their control. (CVE-2010-0296)

It was discovered that the glibc fnmatch() function did not properly restrict the use of alloca(). If the function was called on sufficiently large inputs, it could cause an application using fnmatch() to crash or, possibly, execute arbitrary code with the privileges of the application. (CVE-2011-1071)

It was discovered that the locale command did not produce properly escaped output as required by the POSIX specification. If an attacker were able to set the locale environment variables in the environment of a script that performed shell evaluation on the output of the locale command, and that script were run with different privileges than the attacker's, it could execute arbitrary code with the privileges of the script. (CVE-2011-1095)

All users should upgrade to these updated packages, which contain backported patches to correct these issues.

Solution

Update the affected packages.

See Also

https://access.redhat.com/security/cve/cve-2010-0296

https://access.redhat.com/security/cve/cve-2011-0536

https://access.redhat.com/security/cve/cve-2011-1071

https://access.redhat.com/security/cve/cve-2011-1095

https://access.redhat.com/security/cve/cve-2011-1658

https://access.redhat.com/security/cve/cve-2011-1659

https://access.redhat.com/errata/RHSA-2011:0412

Plugin Details

Severity: High

ID: 53291

File Name: redhat-RHSA-2011-0412.nasl

Version: 1.17

Type: local

Agent: unix

Published: 2011/04/05

Updated: 2019/09/16

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:glibc, p-cpe:/a:redhat:enterprise_linux:glibc-common, p-cpe:/a:redhat:enterprise_linux:glibc-devel, p-cpe:/a:redhat:enterprise_linux:glibc-headers, p-cpe:/a:redhat:enterprise_linux:glibc-utils, p-cpe:/a:redhat:enterprise_linux:nscd, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:5.6

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: 2011/04/04

Vulnerability Publication Date: 2010/06/01

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (glibc "$ORIGIN" Expansion Privilege Escalation)

Reference Information

CVE: CVE-2010-0296, CVE-2010-3847, CVE-2011-0536, CVE-2011-1071, CVE-2011-1095, CVE-2011-1658, CVE-2011-1659

BID: 46563, 46740, 64465

RHSA: 2011:0412