REDHAT-BUG-639390: Low severity FreeRADIUS freeradius vulnerability
It was reported [1],[2] that an error when processing DHCP requests with the 'Relay Agent Information' option (82) in src/lib/dhcp.c could be exploited to cause an infinite loop, in the process denying further requests via a packet with multiple sub-options.
According to the upstream report, this flaw seems to only affect 2.1.9 and was fixed [3] in 2.1.10.
[1] https://bugs.freeradius.org/bugzilla/showbug.cgi?id=77 [2] http://secunia.com/advisories/41621 [3] http://github.com/alandekok/freeradius-server/commit/4dc7800b866f889a1247685bbaa6dd4238a56279
The offending file (dhcp.c) is not present in the version of freeradius as provided with Red Hat Enterprise Linux 5 (1.1.3).
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-639390?
REDHAT-BUG-639390 has a high severity because it can be exploited to create an infinite loop, affecting the availability of the DHCP service.
How do I fix REDHAT-BUG-639390?
To fix REDHAT-BUG-639390, users should update their FreeRADIUS server to the latest patched version that addresses this vulnerability.
What causes the vulnerability REDHAT-BUG-639390?
The vulnerability REDHAT-BUG-639390 is caused by an error in processing DHCP requests with the 'Relay Agent Information' option, leading to an infinite loop.
What impact does REDHAT-BUG-639390 have on network services?
The impact of REDHAT-BUG-639390 includes denial of service for further DHCP requests, potentially disrupting network connectivity.
Is REDHAT-BUG-639390 specific to any version of FreeRADIUS?
Yes, REDHAT-BUG-639390 specifically affects FreeRADIUS servers that do not have the appropriate updates to mitigate this vulnerability.