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Debian Security Advisory DSA 4455-1 (heimdal - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'heimdal' package(s) announced via the DSA-4455-1 advisory.
Insight
Insight
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 referenced Samba advisory. 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.
Affected Software
Affected Software
'heimdal' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
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.