The 802.11 network stack in net80211/ieee80211_input.c in MadWifi before 0.9.3.1 allows remote attackers to cause a denial of service (system hang) via a crafted length field in nested 802.3 Ethernet frames in Fast Frame packets, which results in a NULL pointer dereference.

The madwifi driver and userland packages were updated to 0.9.3.1.
Please note that while the RPM version still says '0.9.3', the content is the 0.9.3.1 version.

This updates fixes following security problems :

  - The 802.11 network stack in net80211/ieee80211_input.c     in MadWifi before 0.9.3.1 allows remote attackers to     cause a denial of service (system hang) via a crafted     length field in nested 802.3 Ethernet frames in Fast     Frame packets, which results in a NULL pointer     dereference. (CVE-2007-2829)

  - 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. (CVE-2007-2830)

  - Array index error in the (1)     ieee80211_ioctl_getwmmparams and (2)     ieee80211_ioctl_setwmmparams functions in     net80211/ieee80211_wireless.c in MadWifi before 0.9.3.1     allows local users to cause a denial of service (system     crash), possibly obtain kernel memory contents, and     possibly execute arbitrary code via a large negative     array index value. (CVE-2007-2831)

'remote attackers' are attackers within range of the WiFi reception of the card.

Please note that the problems fixed in 0.9.3 were fixed by the madwifi Version upgrade to 0.9.3 in SLE10 Service Pack 1. (CVE-2005-4835 / CVE-2006-7177 / CVE-2006-7178 / CVE-2006-7179 / CVE-2006-7180).

Multiple flaws in the MadWifi driver were discovered that could lead to a system crash. A physically near-by attacker could generate specially crafted wireless network traffic and cause a denial of service. (CVE-2006-7177, CVE-2006-7178, CVE-2006-7179, CVE-2007-2829, CVE-2007-2830)

A flaw was discovered in the MadWifi driver that would allow unencrypted network traffic to be sent prior to finishing WPA authentication. A physically near-by attacker could capture this, leading to a loss of privacy, denial of service, or network spoofing.
(CVE-2006-7180)

A flaw was discovered in the MadWifi driver's ioctl handling. A local attacker could read kernel memory, or crash the system, leading to a denial of service. (CVE-2007-2831).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The 802.11 network stack in MadWifi prior to 0.9.3.1 would alloa remote attackers to cause a denial of service (system hang) via a crafted length field in nested 802.3 Ethernet frames in Fast Frame packets, which results in a NULL pointer dereference (CVE-2007-2829).

The ath_beacon_config function in MadWifi prior to 0.9.3.1 would allow a remote attacker to cause a denial of service (system crash) via crafted beacon interval information when scanning for access points, which triggered a divide-by-zero error (CVE-2007-2830).

An array index error in MadWifi prior to 0.9.3.1 would allow a local user to cause a denial of service (system crash) and possibly obtain kerenl memory contents, as well as possibly allowing for the execution of arbitrary code via a large negative array index value (CVE-2007-2831).

Updated packages have been updated to 0.9.3.1 to correct these issues.
Wpa_supplicant is built using madwifi-source and has been rebuilt using 0.9.3.1 source.

The remote host is affected by the vulnerability described in GLSA-200706-04 (MadWifi: Multiple vulnerabilities)

    Md Sohail Ahmad from AirTight Networks has discovered a divison by zero     in the ath_beacon_config() function (CVE-2007-2830). The vendor has     corrected an input validation error in the     ieee80211_ioctl_getwmmparams() and ieee80211_ioctl_getwmmparams()     functions(CVE-2007-2831), and an input sanitization error when parsing     nested 802.3 Ethernet frame lengths (CVE-2007-2829).
  Impact :

    An attacker could send specially crafted packets to a vulnerable host     to exploit one of these vulnerabilities, possibly resulting in the     execution of arbitrary code with root privileges, or a Denial of     Service.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
29517	SuSE 10 Security Update : madwifi (ZYPP Patch Number 3897)	Nessus	SuSE Local Security Checks	critical
28080	Ubuntu 6.06 LTS / 6.10 / 7.04 : linux-restricted-modules-2.6.15/.17/.20 vulnerabilities (USN-479-1)	Nessus	Ubuntu Local Security Checks	critical
25598	Mandrake Linux Security Advisory : madwifi-source (MDKSA-2007:132)	Nessus	Mandriva Local Security Checks	critical
25474	GLSA-200706-04 : MadWifi: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical

Detections

Analytics

CVE-2007-2829

high

Tenable Plugins

critical

critical

critical

critical