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CVE-2009-3024

MEDIUM · CVSS 4.3EPSS 1.0%EU EUVD

The verify_hostname_of_cert function in the certificate checking feature in IO-Socket-SSL (IO::Socket::SSL) 1.14 through 1.25 only matches the prefix of a hostname when no wildcard is used, which allows remote attackers to bypass the hostname check for a certificate.

Key facts

CVSS score
4.3 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE)
CWE-310
EPSS score
1.0% (63th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2009-3008)
Published
August 31, 2009
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-3008 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl
  • io-socket-ssl / io-socket-ssl

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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