Source: heimdal Version: 7.5.0+dfsg-3 Severity: important Tags: security upstream
Hi, The following vulnerability was published for heimdal. CVE-2019-14870[0]: | All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and | 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos | delegation model includes a feature allowing for a subset of clients | to be opted out of constrained delegation in any way, either S4U2Self | or regular Kerberos authentication, by forcing all tickets for these | clients to be non-forwardable. In AD this is implemented by a user | attribute delegation_not_allowed (aka not-delegated), which translates | to disallow-forwardable. However the Samba AD DC does not do that for | S4U2Self and does set the forwardable flag even if the impersonated | client has the not-delegated flag set. This issue affects as well heimdal itself. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2019-14870 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14870 [1] https://github.com/heimdal/heimdal/pull/663 [2] https://github.com/heimdal/heimdal/pull/664 (port to 7.1 branch) Please adjust the affected versions in the BTS as needed. Regards, Salvatore
