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
| Author | Note |
|---|---|
| rodrigo-zaiden | the fix commit solely can cause build failures on tests, a follow-up commit to fix it should be 953d9442. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
heimdal Launchpad, Ubuntu, Debian |
lunar |
Needed
|
| xenial |
Released
(1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| kinetic |
Ignored
(end of life, was needed)
|
|
| upstream |
Released
(7.7.1, 7.8, 7.8.git20221115.a6cf945+dfsg-1)
|
|
| jammy |
Needed
|
|
| bionic |
Released
(7.5.0+dfsg-1ubuntu0.3)
|
|
| focal |
Released
(7.7.0+dfsg-1ubuntu1.3)
|
|
| trusty |
Released
(1.6~git20131207+dfsg-1ubuntu1.2+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://github.com/heimdal/heimdal/commit/f9ec7002cdd526ae84fbacbf153162e118f22580 (heimdal-7.7.1) |
||
| 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 |