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Fix transit path validation CVE-2017-6594

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Commit f469fc6 (2010-10-02) inadvertently caused the previous hop realm
to not be added to the transit path of issued tickets.  This may, in
some cases, enable bypass of capath policy in Heimdal versions 1.5
through 7.2.

Note, this may break sites that rely on the bug.  With the bug some
incomplete [capaths] worked, that should not have.  These may now break
authentication in some cross-realm configurations.
This commit is contained in:
Viktor Dukhovni
2016-08-10 23:31:14 +00:00
committed by Nicolas Williams
parent d5dd5aab19
commit b1e699103f
4 changed files with 45 additions and 2 deletions
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@@ -1,3 +1,17 @@
Release Notes - Heimdal - Version Heimdal 7.3
Security
- Fix transit path validation. Commit f469fc6 (2010-10-02) inadvertently
caused the previous hop realm to not be added to the transit path
of issued tickets. This may, in some cases, enable bypass of capath
policy in Heimdal versions 1.5 through 7.2.
Note, this may break sites that rely on the bug. With the bug some
incomplete [capaths] worked, that should not have. These may now break
authentication in some cross-realm configurations.
(CVE-2017-6594)
Release Notes - Heimdal - Version Heimdal 7.2
Bug fixes