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CVE-2009-2473

MediumPublished

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...

Published: Aug 21, 2009
Updated: Aug 7, 2024
Assigning CNA: redhat
Evidence observed: Nov 12, 2009

Primary CVSS

4.3/ 10Medium

nvd · CVSS 2.0

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

EPSS probability estimate

8.4%

Low · next 30 days

Percentile: 94.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Expat 2.0.1 - UTF-8 Character XML Parsing Remote Denial of ServiceExploit
Peter Valchev · linux · Nov 12, 2009

Responsible use

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