Linux kernel SCTP SO_LINGER denial of service

kernel-sctp-dos (29011) The risk level is classified as LowLow Risk

Description:

The Linux kernel is vulnerable to a denial of service attack, caused by improper handling of SCTP sockets. A local attacker could open an SCTP socket with an invalid SO_LINGER value to cause the kernel to crash.

*CVSS:

Base Score: 3.5
  Access Vector: Local
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 2.5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Uncorroborated

Consequences:

Denial of Service

Remedy:

For Debian GNU/Linux:
Refer to DSA-1183-1 or DSA-1184-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux 4:
Refer to RHSA-2006:0689-15 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • The Linux Kernel Archives Web site: The Linux Kernel Archives.
  • ASA-2006-249: kernel security update (RHSA-2006-0689)
  • BID-20087: Linux Kernel SCTP SO_LINGER Local Denial of Service Vulnerability
  • CVE-2006-4535: The Linux kernel 2.6.17.10 and 2.6.17.11 and 2.6.18-rc5 allows local users to cause a denial of service (crash) via an SCTP socket with a certain SO_LINGER value, possibly related to the patch for CVE-2006-3745. NOTE: older kernel versions for specific Linux distributions are also affected, due to backporting of the CVE-2006-3745 patch.
  • DSA-1183: kernel-source-2.4.27 -- several vulnerabilities
  • DSA-1184: kernel-source-2.6.8 -- several vulnerabilities
  • MDKSA-2006:182: Updated kernel packages fix multiple vulnerabilities and bugs
  • MDKSA-2007:025: Updated kernel packages fix multiple vulnerabilities and bugs
  • RHSA-2006-0689: kernel security update
  • SA21945: Linux Kernel SCTP Denial of Service Vulnerability
  • SA22945: Avaya Products Linux Kernel Multiple Vulnerabilities
  • SECTRACK ID: 1016992: Linux Kernel SCTP Socket SO_LINGER Option Lets Local Users Deny Service
  • USN-347-1: Linux kernel vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • Linux Kernel 2.6.17.10
  • Linux Kernel 2.6.17.11
  • Linux Kernel 2.6.18 rc5
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 Desktop

Reported:

Sep 19, 2006

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