The eap_pwd_perform_confirm_exchange function in eap_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6, when EAP-pwd is enabled in a network configuration profile, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an EAP-pwd Confirm message followed by the Identity exchange.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Wpa_supplicant | W1.fi | 2.0 (including) | 2.6 (excluding) |
| Wpa | Ubuntu | devel | * |
| Wpa | Ubuntu | wily | * |
Potential Mitigations
References
- http://w1.fi/security/2015-8/eap-pwd-unexpected-confirm.txt
- http://www.openwall.com/lists/oss-security/2015/11/10/11
- http://www.securityfocus.com/bid/77538
- http://www.ubuntu.com/usn/USN-2808-1
- https://www.debian.org/security/2015/dsa-3397
- http://w1.fi/security/2015-8/eap-pwd-unexpected-confirm.txt
- http://www.openwall.com/lists/oss-security/2015/11/10/11
- http://www.securityfocus.com/bid/77538
- http://www.ubuntu.com/usn/USN-2808-1
- https://www.debian.org/security/2015/dsa-3397