Description
KDE KSSL in kdelibs 3.5.4, 4.2.4, and 4.3 does not properly handle a '\0' character in a domain name in the Subject Alternative Name 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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | kdelibs | 4:3.5.10.dfsg.1-0lenny3 | DSA-1916-1 |
| Debian 4.0 | kdelibs | 4:3.5.5a.dfsg.1-8etch3 | DSA-1916-1 |
Advisories 1
- DSA-1916-1 kdelibs - SSL certificate verification weakness Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=520661
- MDVSA-2009:330 vendor-advisory
- 36468 third-party-advisory
- MDVSA-2011:162 vendor-advisory
- ADV-2009-2532 vdb-entry