← Vulnerability feed

Vulnerability record · CVE-2009-2473 · published 21 August 2009

CVE-2009-2473: Webdav neon vulnerability

Webdav · Neon

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.

4.3 CVSS 2.0 Medium EPSS 8.4% · top 5.2% CWE-399 · CWE-399
4.3CVSS 2.0 base score
8.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
26References
16 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
http://rhn.redhat.com/errata/RHSA-2013-0131.html
http://secunia.com/advisories/36371 Vendor Advisory
http://support.apple.com/kb/HT4435
http://www.mandriva.com/security/advisories?name=MDVSA-2009:221
http://www.vupen.com/english/advisories/2009/2341 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/52633
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html
http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
http://rhn.redhat.com/errata/RHSA-2013-0131.html
http://secunia.com/advisories/36371 Vendor Advisory
http://support.apple.com/kb/HT4435
http://www.mandriva.com/security/advisories?name=MDVSA-2009:221
http://www.vupen.com/english/advisories/2009/2341 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/52633
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html

Track CVE-2009-2473 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2004-0398Webdav cadaver out-of-bounds write vulnerabilityHeap-based buffer overflow in the ne_rfc1036_parse date parsing function for the neon library (libneon) 0.24.5 and earlier, as used by cadaver before…EPSS 5.0%6.8CVE-2004-0179Webdav neon vulnerabilityMultiple format string vulnerabilities in (1) neon 0.24.4 and earlier, and other products that use neon including (2) Cadaver, (3) Subversion, and (4…EPSS 11%5.8CVE-2009-2474Webdav neon inadequate encryption strength vulnerabilityneon before 0.28.6, when OpenSSL or GnuTLS is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) fiel…EPSS 1.5%4.3CVE-2008-3746Webdav neon vulnerabilityneon 0.28.0 through 0.28.2 allows remote servers to cause a denial of service (NULL pointer dereference and crash) via vectors related to Digest auth…EPSS 2.3%8.8CVE-2010-0806Microsoft Internet Explorer Peer Objects use-after-free allows remote code executionInternet Explorer 6, 6 SP1 and 7 contain a use-after-free in the Peer Objects component (iepeers.dll), where an object is accessed after deletion, le…KEVEPSS 82%analysed5.9CVE-2018-0180Cisco IOS Login Block feature denial-of-service via crafted login attemptsMultiple flaws in the Login Enhancements (Login Block) feature of Cisco IOS Software let an unauthenticated remote attacker trigger a reload of the d…KEVEPSS 4.9%analysed5.9CVE-2018-0179Cisco IOS Login Block feature denial-of-service flawMultiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software let an unauthenticated, remote attacker trigger a relo…KEVEPSS 4.9%analysed6.3CVE-2018-0161Cisco IOS SNMP GET Request Causes Device RestartCisco IOS Software on certain Catalyst switches mishandles SNMP read requests for the ciscoFlashMIB object ID, causing a SYS-3-CPUHOG condition that …KEVEPSS 4.1%analysed

Source: NIST National Vulnerability Database (record CVE-2009-2473), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.