openSUSE Security Update: Security update for libheimdal ______________________________________________________________________________ Announcement ID: openSUSE-SU-2017:2180-1 Rating: moderate References: #1048278 Cross-References: CVE-2017-11103 CVE-2017-6594 Affected Products: openSUSE Leap 42.3 openSUSE Leap 42.2 ______________________________________________________________________________ An update that fixes two vulnerabilities is now available. Description: This 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. Patch Instructions: To install this openSUSE Security Update use YaST online_update. Alternatively you can run the command listed for your product: - openSUSE Leap 42.3: zypper in -t patch openSUSE-2017-937=1 - openSUSE Leap 42.2: zypper in -t patch openSUSE-2017-937=1 To bring your system up-to-date, use "zypper patch". Package List: - openSUSE Leap 42.3 (i586 x86_64): libheimdal-7.4.0-3.1 libheimdal-debuginfo-7.4.0-3.1 libheimdal-debugsource-7.4.0-3.1 libheimdal-devel-7.4.0-3.1 - openSUSE Leap 42.2 (i586 x86_64): libheimdal-7.4.0-2.3.1 libheimdal-debuginfo-7.4.0-2.3.1 libheimdal-debugsource-7.4.0-2.3.1 libheimdal-devel-7.4.0-2.3.1 References: https://www.suse.com/security/cve/CVE-2017-11103.html https://www.suse.com/security/cve/CVE-2017-6594.html https://bugzilla.suse.com/1048278