Description
The fr_dhcp_decode function in lib/dhcp.c in FreeRADIUS 2.1.9, in certain non-default builds, does not properly handle the DHCP Relay Agent Information option, which allows remote attackers to cause a denial of service (infinite loop and daemon outage) via a packet that has more than one sub-option. NOTE: some of these details are obtained from third party information.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | freeradius | 2.1.10+dfsg-1 | — |
| Debian 13 | freeradius | 2.1.10+dfsg-1 | — |
| Debian 12 | freeradius | 2.1.10+dfsg-1 | — |
References
- http://github.com/alandekok/freeradius-server/commit/4dc7800b866f889a1247685bbaa6dd4238a56279
- 41621 third-party-advisory
- [oss-security] 20101001 CVE request: freeradius mailing-list
- http://freeradius.org/press/index.html#2.1.10
- [oss-security] 20101001 Re: CVE request: freeradius mailing-list
- https://bugs.freeradius.org/bugzilla/show_bug.cgi?id=77
- https://bugzilla.redhat.com/show_bug.cgi?id=639390