GNU C Library encode_name macro denial of service

gnuclibrary-encodenamemacro-dos (59240) The risk level is classified as MediumMedium Risk

Description:

GNU C Library is vulnerable to a denial of service, caused by the improper handling of newline characters in mountpoint names by encode_name macro in misc/mntent_r.c. A local attacker could exploit this vulnerability using a specially-crafted request to cause a denial of service or possibly launch further attacks on the system.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 1.7
  Exploitability: Unproven
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Denial of Service

Remedy:

Apply the appropriate patch for your system. See References.

References:

  • ASA-2012-155: glibc security and bug fix update (RHSA-2012-0125).
  • GNU C Library Web page: GNC C Library - GNU Project - Free Software Foundation (FSF).
  • Red Hat Bugzilla Bug 559579: CVE-2010-0296 glibc: Improper encoding of names with certain special character in utilities for writing to mtab table.
  • VMSA-2011-0010: VMware ESX third party updates for Service Console.
  • CVE-2010-0296: The encode_name macro in misc/mntent_r.c in the GNU C Library (aka glibc or libc6) 2.11.1 and earlier, as used by ncpmount and mount.cifs, does not properly handle newline characters in mountpoint names, which allows local users to cause a denial of service (mtab corruption), or possibly modify mount options and gain privileges, via a crafted mount request.
  • DSA-2058: eglibc -- multiple vulnerabilities
  • GLSA-201011-01: GNU C library: Multiple vulnerabilities
  • MDVSA-2010:111: glibc
  • MDVSA-2010:112: glibc
  • OSVDB ID: 65078: GNU C Library (glibc) misc/mntent_r.c encode_name Macro Crafted Mount Request Local DoS
  • OSVDB ID: 74883: GNU C Library (glibc) addmntent Function mtab Write RLIMIT_FSIZE Value Handling Local DoS
  • RHSA-2011-0412: Important: glibc security update
  • RHSA-2012-0125: Moderate: glibc security and bug fix update
  • SA45467: VMware ESX Console OS (COS) Multiple Vulnerabilities
  • SA46397: VMware ESX / ESXi Server Multiple Vulnerabilities
  • SA53166: Avaya Communication Manager OpenSSL and glibc Vulnerabilities
  • SECTRACK ID: 1024043: GNU Glibc mntent Newline Processing Error Lets Local Users Gain Elevated Privileges
  • SUSE-SA:2010:052: Linux kernel security update

Platforms Affected:

  • Avaya Communication Manager 4.0
  • Avaya Communication Manager 5.0
  • Debian Debian Linux 5.0
  • Gentoo Linux
  • GNU glibc 2.0
  • GNU glibc 2.0.1
  • GNU glibc 2.0.2
  • GNU glibc 2.0.3
  • GNU glibc 2.0.4
  • GNU glibc 2.0.5
  • GNU glibc 2.0.6
  • GNU glibc 2.1
  • GNU glibc 2.1.1
  • GNU glibc 2.1.1.6
  • GNU glibc 2.1.2
  • GNU glibc 2.1.3
  • GNU glibc 2.1.9
  • GNU Glibc 2.10
  • GNU Glibc 2.10.1
  • GNU Glibc 2.11
  • GNU Glibc 2.11.1
  • GNU glibc 2.2
  • GNU glibc 2.2.1
  • GNU glibc 2.2.2
  • GNU glibc 2.2.3
  • GNU glibc 2.2.4
  • GNU glibc 2.2.5
  • GNU glibc 2.3
  • GNU glibc 2.3.1
  • GNU glibc 2.3.10
  • GNU glibc 2.3.2
  • GNU glibc 2.3.3
  • GNU glibc 2.3.4
  • GNU Glibc 2.3.5
  • GNU Glibc 2.3.6
  • GNU Glibc 2.4
  • GNU Glibc 2.5
  • GNU Glibc 2.5.1
  • GNU Glibc 2.6
  • GNU Glibc 2.6.1
  • GNU Glibc 2.7
  • GNU Glibc 2.8
  • GNU Glibc 2.9
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Mandriva Enterprise Server 5
  • Mandriva Enterprise Server 5 X86_64
  • Mandriva Linux 2009.0
  • Mandriva Linux 2009.0 X86_64
  • Mandriva Linux 2009.1
  • Mandriva Linux 2009.1 X86_64
  • Mandriva Linux 2010 X86_64
  • Mandriva Linux 2010
  • Novell SLE SDK 10
  • Novell SUSE Linux Enterprise Server 10
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux EUS 5.6.z
  • RedHat Enterprise Linux Long Life 5.6
  • SuSE Linux Enterprise Server 9
  • VMware ESX Server 3.0.0
  • VMware ESX Server 4.0

Reported:

Jun 02, 2010

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