CVE-2009-3044

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-09-02 · updated 2026-06-16
Weakness: CWE-310

Description

Opera before 10.00 does not properly handle a (1) '\0' character or (2) invalid wildcard 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.

Affected products

Opera Browser: through 10.00; 1.00, 2.00, 2.10, 2.10-beta1, 2.10-beta2, 2.10-beta3 (+107)

References

http://www.opera.com/docs/changelogs/freebsd/1000/
http://www.opera.com/docs/changelogs/linux/1000/
http://www.opera.com/docs/changelogs/mac/1000/
http://www.opera.com/docs/changelogs/solaris/1000/
http://www.opera.com/docs/changelogs/windows/1000/
http://www.opera.com/support/kb/view/934/
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6444
http://www.opera.com/docs/changelogs/freebsd/1000/
http://www.opera.com/docs/changelogs/linux/1000/
http://www.opera.com/docs/changelogs/mac/1000/
http://www.opera.com/docs/changelogs/solaris/1000/
http://www.opera.com/docs/changelogs/windows/1000/

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