CVE-2009-4873

critical

Published 2010-05-26 · Modified 2026-04-29

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

10.0

Description

Stack-based buffer overflow in the HTTP server in Rhino Software Serv-U Web Client 9.0.0.5 allows remote attackers to cause a denial of service (server crash) or execute arbitrary code via a long Session cookie.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ 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 with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-9966 remote windows verified

Nikolas Rangos · 2009-11-02

Serv-U Web Client 9.0.0.5 - Remote Buffer Overflow (1)

Source code queued for fetch — refresh in a moment.

EDB-9800 remote windows verified

Megumi Yanagishita · 2009-11-05

Serv-U Web Client 9.0.0.5 - Remote Buffer Overflow (2)

Source code queued for fetch — refresh in a moment.

Application impact

Vendor	Product	Versions	Fixed
rhinosoft	serv-u	`9.0.0.5`

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.