Updated glibc packages that fix three security issues are now available for Red Hat Enterprise Linux 6.

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 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.

From Red Hat Security Advisory 2011:0412 :

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.

a. ESX third-party update for Service Console kernel

   This update takes the console OS kernel package to    kernel-2.6.18-238.9.1 which resolves multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2010-1083, CVE-2010-2492, CVE-2010-2798,    CVE-2010-2938, CVE-2010-2942, CVE-2010-2943, CVE-2010-3015,    CVE-2010-3066, CVE-2010-3067, CVE-2010-3078, CVE-2010-3086,    CVE-2010-3296, CVE-2010-3432, CVE-2010-3442, CVE-2010-3477,    CVE-2010-3699, CVE-2010-3858, CVE-2010-3859, CVE-2010-3865,    CVE-2010-3876, CVE-2010-3877, CVE-2010-3880, CVE-2010-3904,    CVE-2010-4072, CVE-2010-4073, CVE-2010-4075, CVE-2010-4080,    CVE-2010-4081, CVE-2010-4083, CVE-2010-4157, CVE-2010-4158,    CVE-2010-4161, CVE-2010-4238, CVE-2010-4242, CVE-2010-4243,    CVE-2010-4247, CVE-2010-4248, CVE-2010-4249, CVE-2010-4251,    CVE-2010-4255, CVE-2010-4263, CVE-2010-4343, CVE-2010-4346,    CVE-2010-4526, CVE-2010-4655, CVE-2011-0521, CVE-2011-0710,    CVE-2011-1010, CVE-2011-1090 and CVE-2011-1478 to these issues.

b. ESX third-party update for Service Console krb5 RPMs

   This patch updates the krb5-libs and krb5-workstation RPMs of the    console OS to version 1.6.1-55.el5_6.1, which resolves multiple    security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2010-1323, CVE-2011-0281, and CVE-2011-0282    to these issues.

c. ESXi and ESX update to third-party component glibc

   The glibc third-party library is updated to resolve multiple    security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2010-0296, CVE-2011-0536, CVE-2011-1071,    CVE-2011-1095, CVE-2011-1658, and CVE-2011-1659 to these issues.

d. ESX update to third-party drivers mptsas, mpt2sas, and mptspi

   The mptsas, mpt2sas, and mptspi drivers are updated which addresses    multiple security issues in the mpt2sas driver.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the names CVE-2011-1494 and CVE-2011-1495 to these issues.

The remote VMware ESX / ESXi host is missing a security-related patch.
It is, therefore, affected by multiple vulnerabilities in several third-party components and libraries :

  - Kernel
  - krb5
  - glibc
  - mtp2sas
  - mptsas
  - mptspi

From Red Hat Security Advisory 2011:0413 :

Updated glibc packages that fix three security issues are now available for Red Hat Enterprise Linux 6.

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 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.

It was discovered that the GNU C Library did not properly handle integer overflows in the timezone handling code. An attacker could use this to possibly execute arbitrary code by convincing an application to load a maliciously constructed tzfile. (CVE-2009-5029)

It was discovered that the GNU C Library did not properly handle passwd.adjunct.byname map entries in the Network Information Service (NIS) code in the name service caching daemon (nscd). An attacker could use this to obtain the encrypted passwords of NIS accounts. This issue only affected Ubuntu 8.04 LTS. (CVE-2010-0015)

Chris Evans reported that the GNU C Library did not properly calculate the amount of memory to allocate in the fnmatch() code. An attacker could use this to cause a denial of service or possibly execute arbitrary code via a maliciously crafted UTF-8 string. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS and Ubuntu 10.10.
(CVE-2011-1071)

Tomas Hoger reported that an additional integer overflow was possible in the GNU C Library fnmatch() code. An attacker could use this to cause a denial of service via a maliciously crafted UTF-8 string. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04. (CVE-2011-1659)

Dan Rosenberg discovered that the addmntent() function in the GNU C Library did not report an error status for failed attempts to write to the /etc/mtab file. This could allow an attacker to corrupt /etc/mtab, possibly causing a denial of service or otherwise manipulate mount options. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04. (CVE-2011-1089)

Harald van Dijk discovered that the locale program included with the GNU C library did not properly quote its output. This could allow a local attacker to possibly execute arbitrary code using a crafted localization string that was evaluated in a shell script. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS and Ubuntu 10.10.
(CVE-2011-1095)

It was discovered that the GNU C library loader expanded the $ORIGIN dynamic string token when RPATH is composed entirely of this token.
This could allow an attacker to gain privilege via a setuid program that had this RPATH value. (CVE-2011-1658)

It was discovered that the GNU C library implementation of memcpy optimized for Supplemental Streaming SIMD Extensions 3 (SSSE3) contained a possible integer overflow. An attacker could use this to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 10.04 LTS. (CVE-2011-2702)

John Zimmerman discovered that the Remote Procedure Call (RPC) implementation in the GNU C Library did not properly handle large numbers of connections. This could allow a remote attacker to cause a denial of service. (CVE-2011-4609)

It was discovered that the GNU C Library vfprintf() implementation contained a possible integer overflow in the format string protection code offered by FORTIFY_SOURCE. An attacker could use this flaw in conjunction with a format string vulnerability to bypass the format string protection and possibly execute arbitrary code. (CVE-2012-0864).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote VMware ESXi 5.0 host is affected by the following security vulnerabilities :

  - A security bypass vulnerability exists in the e1000     driver in the Linux kernel due to improper handling of     Ethernet frames that exceed the MTU. An unauthenticated,     remote attacker can exploit this, via trailing payload     data, to bypass packet filters. (CVE-2009-4536)

  - An error exists in the file misc/mntent_r.c that could     allow a local attacker to cause denial of service     conditions. (CVE-2010-0296)

  - An error exists related to glibc, the dynamic linker     and '$ORIGIN' substitution that could allow privilege     escalation. (CVE-2011-0536)

  - An error exists in the function 'fnmatch' in the file     posix/fnmatch.c that could allow arbitrary code     execution. (CVE-2011-1071)

  - An error exists in the file locale/programs/locale.c     related to localization environment variables that     could allow privilege escalation. (CVE-2011-1095)

  - An error exists related to glibc, the dynamic linker     and 'RPATH' that could allow privilege escalation.
    (CVE-2011-1658)

  - An error exists in the function 'fnmatch' related to     UTF-8 string handling that could allow privilege     escalation. (CVE-2011-1659)

The remote host is affected by the vulnerability described in GLSA-201312-01 (GNU C Library: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in GNU C Library. Please       review the CVE identifiers referenced below for details.
  Impact :

    A local attacker could trigger vulnerabilities in dynamic library       loader, making it possible to load attacker-controlled shared objects       during execution of setuid/setgid programs to escalate privileges.
    A context-dependent attacker could trigger various vulnerabilities in       GNU C Library, including a buffer overflow, leading to execution of       arbitrary code or a Denial of Service.
  Workaround :

    There is no known workaround at this time.

The remote VMware ESX host is missing a security-related patch. It is, therefore, affected by multiple vulnerabilities, including arbitrary code execution vulnerabilities, in several third-party components and libraries :

  - DHCP
  - glibc

a. Service Console update for DHCP

    The DHCP client daemon, dhclient, does not properly sanatize     certain options in DHCP server replies. An attacker could send a     specially crafted DHCP server reply, that is saved on     the client system and evaluated by a process that assumes the     option is trusted. This could lead to arbitrary code execution     with the privileges of the evaluating process.

    The Common Vulnerabilities and Exposures project (cve.mitre.org)     has assigned the name CVE-2011-0997 to this issue.

b. Service Console update for glibc

    This patch updates the glibc package for ESX service console to     glibc-2.5-58.7602.vmw. This fixes multiple security issues in     glibc, glibc-common and nscd including possible local privilege     escalation.
     The Common Vulnerabilities and Exposures project (cve.mitre.org)     has assigned the identifiers CVE-2010-0296, CVE-2011-0536,     CVE-2011-1095, CVE-2011-1071, CVE-2011-1658 and CVE-2011-1659 to     these issues.

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.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2011:0412 advisory.

  - glibc: Improper encoding of names with certain special character in utilities for writing to mtab table     (CVE-2010-0296)

  - glibc: CVE-2010-3847 fix causes linker to search CWD when running privileged program with $ORIGIN in     R*PATH (CVE-2011-0536)

  - glibc: fnmatch() alloca()-based memory corruption flaw (CVE-2011-1071, CVE-2011-1659)

  - glibc: insufficient quoting in the locale command output (CVE-2011-1095)

  - glibc: ld.so insecure handling of privileged programs' RPATHs with $ORIGIN (CVE-2011-1658)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
53292	RHEL 6 : glibc (RHSA-2011:0413)	Nessus	Red Hat Local Security Checks	4/5/2011	1/14/2021	medium
68244	Oracle Linux 5 : glibc (ELSA-2011-0412)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	high
56508	VMSA-2011-0012 : VMware ESXi and ESX updates to third-party libraries and ESX Service Console	Nessus	VMware ESX Local Security Checks	10/14/2011	5/14/2023	high
89680	VMware ESX / ESXi Third-Party Libraries Multiple Vulnerabilities (VMSA-2011-0012) (remote check)	Nessus	Misc.	3/4/2016	5/14/2023	high
68245	Oracle Linux 6 : glibc (ELSA-2011-0413)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	medium
58318	Ubuntu 8.04 LTS / 10.04 LTS / 10.10 / 11.04 / 11.10 : eglibc, glibc vulnerabilities (USN-1396-1)	Nessus	Ubuntu Local Security Checks	3/12/2012	9/19/2019	high
70880	ESXi 5.0 < Build 515841 Multiple Vulnerabilities (remote check)	Nessus	Misc.	11/13/2013	11/27/2019	high
71167	GLSA-201312-01 : GNU C Library: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	12/3/2013	1/6/2021	medium
89679	VMware ESX Third-Party Libraries Multiple Vulnerabilities (VMSA-2011-0010) (remote check)	Nessus	Misc.	3/4/2016	1/6/2021	high
55747	VMSA-2011-0010 : VMware ESX third-party updates for Service Console packages glibc and dhcp	Nessus	VMware ESX Local Security Checks	8/1/2011	1/6/2021	high
53430	CentOS 5 : glibc (CESA-2011:0412)	Nessus	CentOS Local Security Checks	4/15/2011	1/4/2021	high
53291	RHEL 5 : glibc (RHSA-2011:0412)	Nessus	Red Hat Local Security Checks	4/5/2011	4/21/2024	high

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