Vulnerabilities in various implementations of the Remote Authentication Dial-In User Server (RADIUS) 'radiusd' daemon can allow an attacker to disrupt services or obtain unauthorized access.
Various implementations of the Remote Authentication Dial-In User Server (RADIUS) 'radiusd' daemon may contain buffer-overflow, format-string, and other vulnerabilities.
CERT/CC has identified three potential buffer-overflow vulnerabilities in Merit 3.6b RADIUS. These vulnerabilities stem from calls to strcpy() without enforcing buffer size limits when managing the user_realm, id, and name input variables. Version 3.6b1 corrects these vulnerabilities and improves bounds checking in the packet_log function to prevent more buffer overflows. Interlink Networks found additional vulnerabilities that were not resolved in 3.6b1, and they have corrected these in version 3.6b2.
Attackers who exploit these vulnerabilities may be able to interrupt RADIUS services or execute commands as the RADIUS user, which typically has administrator privileges. Loss or tampering of RADIUS services may prevent all access or allow unauthorized access to computer networks.
Apply patches available from your vendor.
Thanks to Internet Security Systems X-Force for publishing an advisory on these vulnerabilities.
This document was written by Shawn Van Ittersum.
|Date First Published:||2001-07-27|
|Date Last Updated:||2001-08-07 15:01 UTC|