Three vulnerabilities have been reported in FreeRADIUS, which can be exploited by malicious people to cause a DoS (Denial of Service).
All three vulnerabilities are located within a function responsible for decoding RADIUS attributes into data structures.
1) An input validation error can be exploited to crash the service by sending a malicious packet containing specially crafted USR vendor-specific attributes.
2) A NULL pointer dereference error can be exploited to crash the service by sending a malicious "Access-Request" or "Accounting-Request" packet containing an "Ascend-Send-Secret" or "Ascend-Recv-Secret" attribute.
3) A memory leak can be exploited to consume all available memory via a series of "Access-Request" packets containing "Ascend-Send-Secret", "Ascend-Recv-Secret", or "Tunnel-Password" attributes.
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
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Subject: FreeRADIUS Multiple Denial of Service Vulnerabilities
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