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CVE-2021-44758

Published: 26 December 2022

Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept.

Notes

AuthorNote
rodrigo-zaiden
the fix commit solely can cause build failures on tests,
a follow-up commit to fix it should be 953d9442.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
heimdal
Launchpad, Ubuntu, Debian
bionic
Released (7.5.0+dfsg-1ubuntu0.3)
focal
Released (7.7.0+dfsg-1ubuntu1.3)
jammy Needed

kinetic Ignored
(end of life, was needed)
lunar Ignored
(end of life, was needed)
mantic Ignored
(end of life, was needed)
noble Needed

trusty
Released (1.6~git20131207+dfsg-1ubuntu1.2+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (7.7.1, 7.8, 7.8.git20221115.a6cf945+dfsg-1)
xenial
Released (1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580
Binaries built from this source package are in Universe and so are supported by the community.

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H