Executive Summary

Summary
Title GNU C library dynamic linker expands $ORIGIN in setuid library search path
Informations
Name VU#537223 First vendor Publication 2010-10-25
Vendor VU-CERT Last vendor Modification 2010-10-26
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#537223

GNU C library dynamic linker expands $ORIGIN in setuid library search path

Overview

Certain versions of glibc unsafely handle the $ORIGIN ELF substitution sequence which can be exploited to gain local privilege escalation.

I. Description

Tavis Ormandy's advisory states:

"$ORIGIN is an ELF substitution sequence representing the location of the executable being loaded in the filesystem hierarchy. The intention is to allow executables to specify a search path for libraries that is relative to their location, to simplify packaging without spamming the standard search paths with single-use libraries."
...
"$ORIGIN is only expanded if it is alone and first in the path. This makes little sense, and does not appear to be useful even if there were no security impact. This was most likely the result of an attempt to re-use the existing DT_NEEDED resolution infrastructure for LD_AUDIT support, accidentally introducing this error. Perhaps surprisingly, this error is exploitable."

Versions 2.12.1 on Fedora Core 13 and 2.5 on RHEL5 and CENTOS5 are known to be affected. Other versions and Linux distributions are probably affected but have not been confirmed at this time.

Full details are available in Tavis Ormandy's advisory.

II. Impact

A local unprivileged attacker can escalate their privileges to root.

III. Solution

Apply an update for the glibc packages from distribution vendors.

Vendor Information

VendorStatusDate NotifiedDate Updated
CentOSAffected2010-10-25
Debian GNU/LinuxAffected2010-10-26
Fedora ProjectAffected2010-10-25
Gentoo LinuxUnknown2010-10-25
Mandriva S. A.Affected2010-10-26
Red Hat, Inc.Affected2010-10-25
Slackware Linux Inc.Affected2010-10-26
UbuntuAffected2010-10-26

References

http://seclists.org/fulldisclosure/2010/Oct/257

Credit

Thanks to Tavis Ormandy for researching and publishing the details of this vulnerability.

This document was written by Jared Allar.

Other Information

Date Public:2010-10-18
Date First Published:2010-10-25
Date Last Updated:2010-10-26
CERT Advisory: 
CVE-ID(s):CVE-2010-3847
NVD-ID(s):CVE-2010-3847
US-CERT Technical Alerts: 
Metric:13.36
Document Revision:16

Original Source

Url : http://www.kb.cert.org/vuls/id/537223

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-59 Improper Link Resolution Before File Access ('Link Following')

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:19821
 
Oval ID: oval:org.mitre.oval:def:19821
Title: VMware ESX third party updates for Service Console packages glibc, sudo, and openldap
Description: elf/dl-load.c in ld.so in the GNU C Library (aka glibc or libc6) through 2.11.2, and 2.12.x through 2.12.1, does not properly handle a value of $ORIGIN for the LD_AUDIT environment variable, which allows local users to gain privileges via a crafted dynamic shared object (DSO) located in an arbitrary directory.
Family: unix Class: vulnerability
Reference(s): CVE-2010-3847
 Version: 4
Platform(s): VMWare ESX Server 4.1
VMWare ESX Server 4.0
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22199
 
Oval ID: oval:org.mitre.oval:def:22199
Title: RHSA-2010:0787: glibc security update (Important)
Description: elf/dl-load.c in ld.so in the GNU C Library (aka glibc or libc6) through 2.11.2, and 2.12.x through 2.12.1, does not properly handle a value of $ORIGIN for the LD_AUDIT environment variable, which allows local users to gain privileges via a crafted dynamic shared object (DSO) located in an arbitrary directory.
Family: unix Class: patch
Reference(s): RHSA-2010:0787-01
CESA-2010:0787
CVE-2010-3847
 Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
 Product(s): glibc
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23012
 
Oval ID: oval:org.mitre.oval:def:23012
Title: ELSA-2010:0787: glibc security update (Important)
Description: elf/dl-load.c in ld.so in the GNU C Library (aka glibc or libc6) through 2.11.2, and 2.12.x through 2.12.1, does not properly handle a value of $ORIGIN for the LD_AUDIT environment variable, which allows local users to gain privileges via a crafted dynamic shared object (DSO) located in an arbitrary directory.
Family: unix Class: patch
Reference(s): ELSA-2010:0787-01
CVE-2010-3847
 Version: 6
Platform(s): Oracle Linux 5
 Product(s): glibc
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27665
 
Oval ID: oval:org.mitre.oval:def:27665
Title: DEPRECATED: ELSA-2010-0787 -- glibc security update (important)
Description: [2.5-49.el5_5.6] - Never expand in privileged programs (#643818, CVE-2010-3847)
Family: unix Class: patch
Reference(s): ELSA-2010-0787
CVE-2010-3847
 Version: 4
Platform(s): Oracle Linux 5
 Product(s): glibc
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 99

ExploitDB Exploits

id Description
2010-10-22 GNU C library dynamic linker LD_AUDIT arbitrary DSO load Vulnerability
2010-10-18 GNU C library dynamic linker $ORIGIN expansion Vulnerability

OpenVAS Exploits

Date Description
2012-07-30 Name : CentOS Update for glibc CESA-2011:0412 centos5 x86_64
File : nvt/gb_CESA-2011_0412_glibc_centos5_x86_64.nasl
2012-06-06 Name : RedHat Update for glibc RHSA-2011:0413-01
File : nvt/gb_RHSA-2011_0413-01_glibc.nasl
2011-11-28 Name : Mandriva Update for glibc MDVSA-2011:178 (glibc)
File : nvt/gb_mandriva_MDVSA_2011_178.nasl
2011-08-09 Name : CentOS Update for glibc CESA-2010:0787 centos5 i386
File : nvt/gb_CESA-2010_0787_glibc_centos5_i386.nasl
2011-08-09 Name : CentOS Update for glibc CESA-2011:0412 centos5 i386
File : nvt/gb_CESA-2011_0412_glibc_centos5_i386.nasl
2011-04-06 Name : RedHat Update for glibc RHSA-2011:0412-01
File : nvt/gb_RHSA-2011_0412-01_glibc.nasl
2011-03-09 Name : Gentoo Security Advisory GLSA 201011-01 (glibc)
File : nvt/glsa_201011_01.nasl
2011-03-07 Name : Debian Security Advisory DSA 2122-2 (glibc)
File : nvt/deb_2122_2.nasl
2011-01-14 Name : Ubuntu Update for eglibc, glibc vulnerability USN-1009-2
File : nvt/gb_ubuntu_USN_1009_2.nasl
2010-12-02 Name : Fedora Update for glibc FEDORA-2010-16308
File : nvt/gb_fedora_2010_16308_glibc_fc14.nasl
2010-11-17 Name : Debian Security Advisory DSA 2122-1 (glibc)
File : nvt/deb_2122_1.nasl
2010-11-16 Name : Fedora Update for glibc FEDORA-2010-16641
File : nvt/gb_fedora_2010_16641_glibc_fc12.nasl
2010-11-16 Name : SuSE Update for glibc SUSE-SA:2010:052
File : nvt/gb_suse_2010_052.nasl
2010-11-04 Name : Fedora Update for glibc FEDORA-2010-16655
File : nvt/gb_fedora_2010_16655_glibc_fc13.nasl
2010-10-26 Name : Fedora Update for glibc FEDORA-2010-16594
File : nvt/gb_fedora_2010_16594_glibc_fc13.nasl
2010-10-26 Name : Ubuntu Update for glibc, eglibc vulnerabilities USN-1009-1
File : nvt/gb_ubuntu_USN_1009_1.nasl
2010-10-22 Name : RedHat Update for glibc RHSA-2010:0787-01
File : nvt/gb_RHSA-2010_0787-01_glibc.nasl
2010-10-22 Name : Mandriva Update for glibc MDVSA-2010:207 (glibc)
File : nvt/gb_mandriva_MDVSA_2010_207.nasl
0000-00-00 Name : Slackware Advisory SSA:2010-295-01 glibc
File : nvt/esoft_slk_ssa_2010_295_01.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
68721 GNU C Library Dynamic Linker $ORIGIN Substitution Expansion Weakness Local Pr...

The weakness is caused due to dynamic linker expanding the "$ORIGIN" substitution for privileged applications, which can be exploited to gain escalated privileges by e.g. hard linking to a setuid application and forcing the expansion of "$ORIGIN" via "LD_AUDIT".

Nessus® Vulnerability Scanner

Date Description
2016-03-04 Name : The remote VMware ESX host is missing a security-related patch.
File : vmware_VMSA-2011-0010_remote.nasl - Type : ACT_GATHER_INFO
2016-03-04 Name : The remote VMware ESX host is missing a security-related patch.
File : vmware_VMSA-2011-0001_remote.nasl - Type : ACT_GATHER_INFO
2015-02-02 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2015-0023.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_glibc-101027.nasl - Type : ACT_GATHER_INFO
2013-12-03 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201312-01.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2011-0413.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2011-0412.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0872.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0787.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101020_glibc_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101110_glibc_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20110404_glibc_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2011-11-28 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2011-178.nasl - Type : ACT_GATHER_INFO
2011-04-15 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2011-0412.nasl - Type : ACT_GATHER_INFO
2011-04-05 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-0412.nasl - Type : ACT_GATHER_INFO
2011-04-05 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-0413.nasl - Type : ACT_GATHER_INFO
2011-01-12 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1009-2.nasl - Type : ACT_GATHER_INFO
2011-01-06 Name : The remote VMware ESX host is missing one or more security-related patches.
File : vmware_VMSA-2011-0001.nasl - Type : ACT_GATHER_INFO
2010-12-02 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_glibc-101025.nasl - Type : ACT_GATHER_INFO
2010-11-24 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0787.nasl - Type : ACT_GATHER_INFO
2010-11-18 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0872.nasl - Type : ACT_GATHER_INFO
2010-11-16 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201011-01.nasl - Type : ACT_GATHER_INFO
2010-11-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-16641.nasl - Type : ACT_GATHER_INFO
2010-10-28 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_glibc-101026.nasl - Type : ACT_GATHER_INFO
2010-10-28 Name : The remote openSUSE host is missing a security update.
File : suse_11_2_glibc-101027.nasl - Type : ACT_GATHER_INFO
2010-10-28 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_glibc-7201.nasl - Type : ACT_GATHER_INFO
2010-10-24 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1009-1.nasl - Type : ACT_GATHER_INFO
2010-10-24 Name : The remote Fedora host is missing a security update.
File : fedora_2010-16594.nasl - Type : ACT_GATHER_INFO
2010-10-24 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2122.nasl - Type : ACT_GATHER_INFO
2010-10-24 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2010-295-01.nasl - Type : ACT_GATHER_INFO
2010-10-21 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0787.nasl - Type : ACT_GATHER_INFO
2010-10-21 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2010-207.nasl - Type : ACT_GATHER_INFO
2010-10-20 Name : The remote Fedora host is missing a security update.
File : fedora_2010-16308.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2016-03-05 13:26:43
  • Multiple Updates