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CVE-2009-2473

neon before 0.28.6, when expat is used, does not properly detect recursion during entity...

4.3 MediumPublic exploitFix available

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.

Exploit likelihood

8.44%Up 3.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 4.3

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.

Record
CVE-2009-2473
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2009-2473
Updated
2026-11-02
EUVDEUVD-2009-2468 No score

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.

Record
EUVD-2009-2468
Updated
2026-11-03
GitHub AdvisoriesGHSA-9vc6-7j3x-7x4v No score

neon before 0.28.6, when expat is used, does not properly detect recursion during entity...

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.

Record
GHSA-9vc6-7j3x-7x4v
Updated
2026-11-02
OSVopenSUSE-SU-2024:10496-1 No score

libneon-devel-0.30.1-1.11 on GA media

These are all security issues fixed in the libneon-devel-0.30.1-1.11 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10496-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
neon
Red Hat:enterprise_linux:4::as
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-devel
Red Hat:enterprise_linux:4::as
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon
Red Hat:enterprise_linux:4::desktop
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-devel
Red Hat:enterprise_linux:4::desktop
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon
Red Hat:enterprise_linux:4::es
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-devel
Red Hat:enterprise_linux:4::es
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon
Red Hat:enterprise_linux:4::ws
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
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Affected packages
PackageAffectedFixed
neon-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon-devel
Red Hat:enterprise_linux:4::ws
 before 0:0.24.7-4.el4_8.2
0:0.24.7-4.el4_8.2
neon
Red Hat:enterprise_linux:5::client_workstation
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon-debuginfo
Red Hat:enterprise_linux:5::client_workstation
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon-devel
Red Hat:enterprise_linux:5::client_workstation
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon
Red Hat:enterprise_linux:5::client
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon
Red Hat:enterprise_linux:5::server
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
neon-devel
Red Hat:enterprise_linux:5::server
 before 0:0.25.5-10.el5_4.1
0:0.25.5-10.el5_4.1
gnome-vfs2
Red Hat:enterprise_linux:5::client_workstation
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-debuginfo
Red Hat:enterprise_linux:5::client_workstation
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-devel
Red Hat:enterprise_linux:5::client_workstation
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2
Red Hat:enterprise_linux:5::client
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-debuginfo
Red Hat:enterprise_linux:5::client
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-smb
Red Hat:enterprise_linux:5::client
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2
Red Hat:enterprise_linux:5::server
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-debuginfo
Red Hat:enterprise_linux:5::server
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-devel
Red Hat:enterprise_linux:5::server
 before 0:2.16.2-10.el5
0:2.16.2-10.el5
gnome-vfs2-smb
Red Hat:enterprise_linux:5::server
 before 0:2.16.2-10.el5
0:2.16.2-10.el5

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBExpat 2.0.1 - UTF-8 Character XML Parsing Remote Denial of Service2009-11-12

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-2473 is a medium vulnerability (CVSS 4.3) in Webdav Neon, published August 21, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 8.44%, the 95th percentile. Fixed in neon 0:0.24.7-4.el4_8.2.

References

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