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Debian Security Advisory DSA-4455-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
June 03, 2019                         https://www.debian.org/security/faq
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Package        : heimdal
CVE ID         : CVE-2018-16860 CVE-2019-12098
Debian Bug     : 928966 929064

Several vulnerabilities were discovered in Heimdal, an implementation of
Kerberos 5 that aims to be compatible with MIT Kerberos.

CVE-2018-16860

    Isaac Boukris and Andrew Bartlett discovered that Heimdal was
    susceptible to man-in-the-middle attacks caused by incomplete
    checksum validation. Details on the issue can be found in the Samba
    advisory at https://www.samba.org/samba/security/CVE-2018-16860.html

CVE-2019-12098

    It was discovered that failure of verification of the PA-PKINIT-KX key
    exchange client-side could permit to perform man-in-the-middle attack.

For the stable distribution (stretch), these problems have been fixed in
version 7.1.0+dfsg-13+deb9u3.

We recommend that you upgrade your heimdal packages.

For the detailed security status of heimdal please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/heimdal

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

Mailing list: debian-security-announce@lists.debian.org
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