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Ubuntu: USN-5849-1 (CVE-2022-45142): Heimdal vulnerabilities

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Ubuntu: USN-5849-1 (CVE-2022-45142): Heimdal vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/06/2023
Created
03/29/2023
Added
03/22/2023
Modified
03/30/2023

Description

The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to the result of memcmp. When these patches were backported to the heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in causing the validation of message integrity codes in gssapi/arcfour to be inverted.

Solution(s)

  • ubuntu-upgrade-libgssapi3-heimdal

References

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