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Fencer Vulns
medium 5.8

CVE-2009-2474 json

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…

published 2009-08-21 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-2469

cvss
5.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

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.

Patch / fix

  • webdav neon 0.28.6
  • apple mac_os_x 10.6.5
  • litmus Debian 14, Debian 13, Debian 12 0.13-1
  • neon27 Debian 14, Debian 13, Debian 12 0.28.6-1

debian advisories DEBIAN-CVE-2009-2474

  • neon RHEL 4 0.24.7-4.el4_8.2
  • neon RHEL 5 0.25.5-10.el5_4.1

red hat advisories RHSA-2009:1452

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-2474 updated cvss 4.0

neon: Improper verification of x509v3 certificate with NULL (zero) byte in certain fields

  • Red Hat Enterprise Linux (v. 5 server) neon 0.25.5-10.el5_4.1 Red Hat Enterprise Linux AS version 4 neon 0.24.7-4.el4_8.2 Red Hat Enterprise Linux Desktop (v. 5 client) neon 0.25.5-10.el5_4.1 Red Hat Enterprise Linux Desktop version 4 neon 0.24.7-4.el4_8.2 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) neon 0.25.5-10.el5_4.1 Red Hat Enterprise Linux ES version 4 neon 0.24.7-4.el4_8.2
    +1 more products
    Red Hat Enterprise Linux WS version 4 neon 0.24.7-4.el4_8.2
    fixed: vendor fix RHSA-2009:1452

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-326 Inadequate Encryption Strength

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.