ESB-2019.0230 - [Debian] krb5: Multiple vulnerabilities 2019-01-29

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0230
               [SECURITY] [DLA 1643-1] krb5 security update
                              29 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           krb5
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Denial of Service   -- Existing Account
                   Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20217 CVE-2018-5730 CVE-2018-5729

Reference:         ESB-2018.3904
                   ESB-2018.3400

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html

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Package        : krb5
Version        : 1.12.1+dfsg-19+deb8u5
CVE ID         : CVE-2018-5729 CVE-2018-5730 CVE-2018-20217


krb5, a MIT Kerberos implementation, had several flaws in LDAP DN 
checking, which could be used to circumvent a DN containership check by 
supplying special parameters to some calls.
Further an attacker could crash the KDC by making S4U2Self requests.


For Debian 8 "Jessie", 
these problems have been fixed in version 1.12.1+dfsg-19+deb8u5.

We recommend that you upgrade your krb5 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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