MadWifi ath_beacon_config() function denial of service

madwifi-athbeaconconfig-dos (34451) The risk level is classified as MediumMedium Risk

Description:

MadWifi is vulnerable to a denial of service, caused by a divide-by-zero error in the ath_beacon_config() function. By sending a specially-crafted packet with a zero beacon interval, a remote attacker could cause the application to crash.

*CVSS:

Base Score: 3.5
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 2.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of MadWifi (0.9.3.1 or later), available from the MadWifi Web site. See References.

For Mandriva Linux (madwifi-source):
Refer to MDKSA-2007:132 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:
Refer to USN-479-1 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SR:2007-014 for patch, upgrade, or suggested workaround information. See References.

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

References:

  • MadWifi Web site: Release v0.9.3.1.
  • BID-24114: MadWifi Multiple Denial of Service Vulnerabilities
  • CVE-2007-2830: The ath_beacon_config function in if_ath.c in MadWifi before 0.9.3.1 allows remote attackers to cause a denial of service (system crash) via crafted beacon interval information when scanning for access points, which triggers a divide-by-zero error.
  • GLSA-200706-04: MadWifi: Multiple vulnerabilities
  • MDKSA-2007:132: Updated madwifi-source
  • OSVDB ID: 36636: MadWifi if_ath.c ath_beacon_config Function Remote DoS
  • SA25339: MadWifi Multiple Denial of Service Vulnerabilities
  • SUSE-SR:2007:014: SUSE Security Summary Report
  • USN-479-1: MadWifi vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Gentoo Linux
  • Madwifi Driver Madwifi Driver prior to 0.9.3.1
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • SuSE SuSE Linux Desktop 10.0

Reported:

May 23, 2007

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