Scientific Linux Security Update : glibc on SL6.x i386/x86_64

High Nessus Plugin ID 60891

Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

It was discovered that the glibc dynamic linker/loader did not handle the $ORIGIN dynamic string token set in the LD_AUDIT environment variable securely. A local attacker with write access to a file system containing setuid or setgid binaries could use this flaw to escalate their privileges. (CVE-2010-3847)

It was discovered that the glibc dynamic linker/loader did not perform sufficient safety checks when loading dynamic shared objects (DSOs) to provide callbacks for its auditing API during the execution of privileged programs. A local attacker could use this flaw to escalate their privileges via a carefully-chosen system DSO library containing unsafe constructors. (CVE-2010-3856)

This update also fixes the following bugs :

- Previously, the generic implementation of the strstr() and memmem() functions did not handle certain periodic patterns correctly and could find a false positive match. This error has been fixed, and both functions now work as expected. (BZ#643341)

- The 'TCB_ALIGNMENT' value has been increased to 32 bytes to prevent applications from crashing during symbol resolution on 64-bit systems with support for Intel AVX vector registers. (BZ#643343)

Solution

Update the affected packages.

See Also

https://bugzilla.redhat.com/show_bug.cgi?id=643341

https://bugzilla.redhat.com/show_bug.cgi?id=643343

http://www.nessus.org/u?79c01b40

Plugin Details

Severity: High

ID: 60891

File Name: sl_20101110_glibc_on_SL6_x.nasl

Version: 1.6

Type: local

Agent: unix

Published: 2012/08/01

Updated: 2019/10/25

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2010/11/10

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (glibc LD_AUDIT Arbitrary DSO Load Privilege Escalation)

Reference Information

CVE: CVE-2010-3847, CVE-2010-3856