openSUSE Security Update : libheimdal (openSUSE-2017-937) (Orpheus' Lyre)
Medium Nessus Plugin ID 102556
SynopsisThe remote openSUSE host is missing a security update.
DescriptionThis update for libheimdal fixes the following issues :
- Fix CVE-2017-11103: Orpheus' Lyre KDC-REP service name validation. This is a critical vulnerability. In
_krb5_extract_ticket() the KDC-REP service name must be obtained from encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'.
Use of the unecrypted version provides an opportunity for successful server impersonation and other attacks.
Identified by Jeffrey Altman, Viktor Duchovni and Nico Williams. See https://www.orpheus-lyre.info/ for more details. (bsc#1048278)
- Fix CVE-2017-6594: transit path validation 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.
SolutionUpdate the affected libheimdal packages.