Linux Kernel execve() denial of service

linux-kernel-execve-dos (64700) The risk level is classified as MediumMedium Risk

Description:

Linux Kernel is vulnerable to a denial of service, caused by an error in the execve() system call implementation. By causing large amounts of memory to be allocated but not visible to the OOM (Out of Memory) killer, a local attacker could exploit this vulnerability to cause certain processes to terminate.

*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: Functional
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Apply the appropriate patch for your system. See References.

References:

  • Linux Kernel Archives Web site: Linux Kernel Archives.
  • Red Hat Bugzilla Bug 625688 : CVE-2010-4243 kernel: mm: mem allocated invisible to oom_kill() when not attached to any threads.
  • BID-45004: Linux Kernel 'execve()' Memory Expansion 'OOM-killer' Local Denial of Service Vulnerability
  • CVE-2010-4243: fs/exec.c in the Linux kernel before 2.6.37 does not enable the OOM Killer to assess use of stack memory by arrays representing the (1) arguments and (2) environment, which allows local users to cause a denial of service (memory consumption) via a crafted exec system call, aka an OOM dodging issue
  • DSA-2153: linux-2.6 -- privilege escalation/denial of service/information leak
  • OSVDB ID: 70659: Linux Kernel fs/exec.c Crafted Exec System Call OOM Dodging Local DoS
  • RHSA-2011-0017: Important: Red Hat Enterprise Linux 5.6 kernel security and bug fix update
  • RHSA-2011-0283: Moderate: kernel security, bug fix, and enhancement update
  • RHSA-2011-1253: Important: kernel-rt security and bug fix update
  • SA46397: VMware ESX / ESXi Server Multiple Vulnerabilities
  • SUSE-SA:2011:012: Linux kernel security update
  • SUSE-SA:2011:017: Linux kernel security problems
  • SUSE-SA:2011:020: Linux kernel security update

Platforms Affected:

  • Linux Kernel 2.6.37
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6
  • RedHat Enterprise Linux Server EUS 6.0.z
  • RedHat Enterprise MRG 2

Reported:

Jan 14, 2011

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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