The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy protection mechanism by leveraging failure to add the previous hop realm to the transit path of issued tickets.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Heimdal | Heimdal_project | * | 7.2.0 (including) |
| Heimdal | Ubuntu | esm-infra-legacy/trusty | * |
| Heimdal | Ubuntu | esm-infra/xenial | * |
| Heimdal | Ubuntu | precise | * |
| Heimdal | Ubuntu | precise/esm | * |
| Heimdal | Ubuntu | trusty | * |
| Heimdal | Ubuntu | trusty/esm | * |
| Heimdal | Ubuntu | upstream | * |
| Heimdal | Ubuntu | vivid/stable-phone-overlay | * |
| Heimdal | Ubuntu | vivid/ubuntu-core | * |
| Heimdal | Ubuntu | xenial | * |
| Heimdal | Ubuntu | yakkety | * |
| Heimdal | Ubuntu | zesty | * |
Potential Mitigations
Related Attack Patterns
References
- http://lists.opensuse.org/opensuse-updates/2017-08/msg00062.html
- http://www.h5l.org/advisories.html?show=2017-04-13
- https://github.com/heimdal/heimdal/commit/b1e699103f08d6a0ca46a122193c9da65f6cf837
- https://github.com/heimdal/heimdal/releases/tag/heimdal-7.3.0
- http://lists.opensuse.org/opensuse-updates/2017-08/msg00062.html
- http://www.h5l.org/advisories.html?show=2017-04-13
- https://github.com/heimdal/heimdal/commit/b1e699103f08d6a0ca46a122193c9da65f6cf837
- https://github.com/heimdal/heimdal/releases/tag/heimdal-7.3.0