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FreeRADIUS Multiple Denial of Service Vulnerabilities
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Secunia Advisory:
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SA12570
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Release Date:
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2004-09-20
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Last Update:
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2004-11-15
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Popularity:
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8,866 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | FreeRADIUS 0.x
FreeRADIUS 1.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2004-0938
CVE-2004-0960
CVE-2004-0961
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Description:
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.
Solution:
Update to version 1.0.1 or later.
http://www.freeradius.org/getting.html
Provided and/or discovered by:
Reported by vendor.
Changelog:
2004-09-22: Added more information.
2004-11-15: Added more information, CVE references, and link to US-CERT vulnerability note.
Other References:
US-CERT VU#541574:
http://www.kb.cert.org/vuls/id/541574
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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