CVE-2004-0953: Buffer overflow in the C2S module in the open source Jabber 2.x server (Jabberd) allows remote attackers to...

Security readout for executives and security teams

CVE-2004-0953 is a remote buffer overflow in the C2S module of the open source Jabber 2.x server, Jabberd. A very long username can crash the service and may allow arbitrary code execution. The sources do not provide CVSS, exact affected versions, a named patch, or evidence of active exploitation. Exposure is most likely where legacy Jabberd 2.x servers still provide C2S client connections, especially if reachable from untrusted networks. The supplied record lacks CPEs and precise affected versions, so asset inventory must verify product and module presence directly. Treat this as a high-priority legacy exposure review, not a confirmed active incident. The business risk is concentrated in old Jabberd 2.x systems that remain reachable. Confirm whether any exist, restrict exposure quickly, and plan replacement if unsupported. Mitigation focus: Identify any Jabberd 2.x deployments and exposed C2S services.; Check Jabberd project or vendor guidance for fixed versions or supported replacements.; Remove, isolate, or restrict untrusted network access to legacy C2S services..

Prepared

Jun 30, 2026, 02:08 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.