CVE-2021-36222
Published: 22 July 2021
ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
krb5 Launchpad, Ubuntu, Debian |
impish |
Not vulnerable
(1.18.3-6)
|
| jammy |
Not vulnerable
(1.19.2-2)
|
|
| kinetic |
Not vulnerable
(1.19.2-2)
|
|
| bionic |
Released
(1.16-2ubuntu0.4)
|
|
| focal |
Released
(1.17-6ubuntu4.3)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(1.19.2, 1.18.3-6)
|
|
| hirsute |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(1.19.2-2)
|
|
| mantic |
Not vulnerable
(1.19.2-2)
|
|
|
Patches: upstream: https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 |
||
| 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 |