What’s Vulnerable › Vulnerabilities

CVE-2009-2474

• Severity: medium (CVSS 5.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-08-21 · updated 2026-06-16
• Weakness: CWE-326

Description

neon 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) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Affected products

• macOS: before 10.6.5 — fixed in 10.6.5
• Canonical Ubuntu Linux: 6.06, 8.04, 8.10, 9.04
• Fedoraproject Fedora: 10, 11
• Webdav Neon: before 0.28.6 — fixed in 0.28.6

How to fix

Upgrade to a fixed version: macOS 10.6.5; Webdav Neon 0.28.6. Check the vendor advisory for mitigations.

References

• 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/001046.html
• http://secunia.com/advisories/36371
• http://secunia.com/advisories/36799
• http://support.apple.com/kb/HT4435
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:221
• http://www.securityfocus.com/bid/36079
• http://www.ubuntu.com/usn/usn-835-1
• http://www.vupen.com/english/advisories/2009/2341
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11721
• https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html

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