Description

The eap_pwd_process function in eap_server/eap_server_pwd.c in hostapd 2.x before 2.6 does not validate that the reassembly buffer is large enough for the final fragment when used with (1) an internal EAP server or (2) a RADIUS server and EAP-pwd is enabled in a runtime configuration, which allows remote attackers to cause a denial of service (process termination) via a large final fragment in an EAP-pwd message.

References

http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt

http://www.openwall.com/lists/oss-security/2015/11/10/10

http://www.ubuntu.com/usn/USN-2808-1

https://www.debian.org/security/2015/dsa-3397

Details

Risk Information

CVSS v2

CVSS v3