CVE-2003-0967

FreeRADIUS < 0.9.2 - Denial of Service via Short RADIUS String Attribute with Tag

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2003-0967. PoCs published by Evgeny Legerov.

AI-analyzed exploit summary This exploit demonstrates a heap-corruption vulnerability in FreeRADIUS by sending a malformed packet with a specific tag-field input. The provided command crafts a packet and sends it via netcat to trigger the vulnerability, potentially causing a denial of service.

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Evgeny Legerov · textdoslinux
https://www.exploit-db.com/exploits/23391

This exploit demonstrates a heap-corruption vulnerability in FreeRADIUS by sending a malformed packet with a specific tag-field input. The provided command crafts a packet and sends it via netcat to trigger the vulnerability, potentially causing a denial of service.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: FreeRADIUS 0.4.0 through 0.9.2, 1.1.3 through 1.1.7
No auth needed
Prerequisites: Network access to the vulnerable FreeRADIUS server · Netcat or similar tool for sending UDP packets
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=106935911101493&w=2
Vendor Advisory vendor-advisory x_refsource_redhat
http://www.redhat.com/support/errata/RHSA-2003-386.html
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10917
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=106944220426970

Scores

EPSS 0.0464
EPSS Percentile 90.5%

Details

Status published
Products (1)
freeradius/freeradius < 0.9.2
Published Dec 15, 2003
Tracked Since Feb 18, 2026