CVE-2009-4873

Serv U vulnerability

CVSS

10.0

EPSS

20.6%

EPSS pct

97th

Exploited

No known

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.

Affected vendor

Rhinosoft

Affected product

Serv U

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Weakness type (CWE)

CWE-119 — Improper Restriction of Operations within Memory Bounds

Published

2010-05-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 20.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2009-4873

Confirm whether Rhinosoft Serv U is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-4873.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-4873

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-4873 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2009-4873?

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