Description
DefaultHostnameVerifier in Ldaptive (formerly vt-ldap) does not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
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 14 | libvt-ldap-java | 3.3.8-1 | — |
| Debian 13 | libvt-ldap-java | 3.3.8-1 | — |
| Debian 12 | libvt-ldap-java | 3.3.8-1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | edu.internet2.middleware:shibboleth-identityprovider | < 2.4.2 | 2.4.2 | GHSA-273v-g3x4-r3rc |
| Maven | edu.vt.middleware:vt-ldap | < 3.3.8 | 3.3.8 | GHSA-273v-g3x4-r3rc |