CVE-2003-0967
Description
rad_decode in FreeRADIUS 0.9.2 and earlier allows remote attackers to cause a denial of service (crash) via a short RADIUS string attribute with a tag, which causes memcpy to be called with a -1 length argument, as demonstrated using the Tunnel-Password attribute.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
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✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
FreeRadius 0.x/1.1.x - Tag Field Heap Corruption
source: https://www.securityfocus.com/bid/9079/info
FreeRADIUS is prone to a heap-corruption vulnerability when handling of tag-field input. An attacker may be able to exploit this issue to deny service to legitimate users of a vulnerable FreeRADIUS server.
This issue was initially reported as a vulnerability in how the software handles 'Tunnel-Password' attribute in Access-Request packets, but the issue turns out to have wider scope, affecting tag-field input in general.
This vulnerability affects FreeRADIUS 0.4.0 through 0.9.2.
UPDATE (September 9, 2009): This issue was fixed in 2003 but reintroduced later. FreeRADIUS 1.1.3 through 1.1.7 are also vulnerable.
bash-2.05$ echo -ne "\x01\x01\x00\x16\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x45\x02" | nc -vu -w1 <victim> <port>OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.9.2-4 |
| sid | Fixed | 0.9.2-4 |
| forky | Fixed | 0.9.2-4 |
| bullseye | Fixed | 0.9.2-4 |
| bookworm | Fixed | 0.9.2-4 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.