MadWifi xrates denial of service

madwifi-xrates-dos (37182) The risk level is classified as MediumMedium Risk

Description:

MadWifi is vulnerable to a denial of service, caused by an error in the handling of beacon frames. By sending a specially-crafted beacon frame containing an overly large length value in the xrates, a remote attacker could cause the driver to exit resulting in a kernel panic.

*CVSS:

Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the fixed version of MadWifi, available from the MadWifi.org SVN Repository. See References.

For other distributions:
Apply the appropriate update for your system. See References.

References:

  • MadWifi Web site: MadWifi.
  • MadWifi.org SVN Repository: MadWifi.
  • SEC-CONSULT Security Advisory 20071012-0: Madwifi xrates element remote DOS.
  • BID-26052: MadWifi Xrates Element Remote Denial of Service Vulnerability
  • CVE-2007-5448: Madwifi 0.9.3.2 and earlier allows remote attackers to cause a denial of service (panic) via a beacon frame with a large length value in the extended supported rates (xrates) element, which triggers an assertion error, related to net80211/ieee80211_scan_ap.c and net80211/ieee80211_scan_sta.c.
  • GLSA-200711-09: MadWifi: Denial of Service
  • MDVSA-2008:007: Updated madwifi-source, wpa_supplicant packages fix vulnerabilities
  • OSVDB ID: 37971: MadWifi Beacon Extended Supported Rates (xrates) Element DoS
  • SA27197: MadWifi "xrates" Element Denial of Service

Platforms Affected:

  • Gentoo Linux
  • Madwifi Driver Madwifi Driver 0.9.3.2
  • 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
  • MandrakeSoft Mandrake Linux 2008.0 X86_64

Reported:

Oct 11, 2007

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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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