Vulnerability Note VU#898931
Multiple vendors' RADIUS implementations do not adequately validate user input thereby permitting DoS and arbitrary command execution via 'radiusd' daemon
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.
Merit offers patches to Merit RADIUS Server 3.6b1 at:
Interlink Networks offers its newer Merit RADIUS Server 3.6b2 at:
Systems Affected (Learn More)
|Vendor||Status||Date Notified||Date Updated|
|Interlink Networks||Affected||16 Jul 2001||07 Aug 2001|
|Merit Networks||Affected||12 Jul 2001||27 Jul 2001|
|Simon Horms||Affected||12 Jul 2001||27 Jul 2001|
CVSS Metrics (Learn More)
Thanks to Internet Security Systems X-Force for publishing an advisory on these vulnerabilities.
This document was written by Shawn Van Ittersum.
- CVE IDs: CAN-2001-0534
- Date Public: 05 Jul 2001
- Date First Published: 27 Jul 2001
- Date Last Updated: 07 Aug 2001
- Severity Metric: 20.11
- Document Revision: 13
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