CVE-2009-2473

Neon vulnerability

CVSS

4.3

EPSS

8.4%

EPSS pct

94th

Exploited

No known

neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

Affected vendor

Webdav

Affected product

Neon

CVSS vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-399

Published

2009-08-21

Risk analysis

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

Its EPSS score of 8.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2009-2473

Confirm whether Webdav Neon is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-2473.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-2473

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-2473 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2009-2473?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2009-2473.

Start free scan

No credit card. Agentless.

Related vulnerabilities

Visual Basic vulnerability