CVE-2022-42898
Published: 25 December 2022
PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
Notes
| Author | Note |
|---|---|
| mdeslaur | Per upstream Samba advisory, this is only an issue on 32-bit systems. |
| rodrigo-zaiden | a regression in heimdal was reported by samba and fixed in https://github.com/heimdal/heimdal/pull/1025 |
| mdeslaur | See samba bug for samba regression fix not yet commited The focal samba update was temporarily reverted by USN 5822-2 because it introduced regressions. It was later updated again with USN 5936-1. |
Priority
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 |
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/b90b219ab8faa6bb0e7c2e7aa241aa7eeab0adac upstream: https://github.com/heimdal/heimdal/commit/0c56257bdac80da015878fffdb0f8a42b8d73246 upstream: https://github.com/heimdal/heimdal/commit/9d1bfab9882d0aa14ae0981e6667c93db93ffc5d |
||
| Binaries built from this source package are in Universe and so are supported by the community. | ||
|
krb5 Launchpad, Ubuntu, Debian |
bionic |
Released
(1.16-2ubuntu0.3)
|
| focal |
Released
(1.17-6ubuntu4.2)
|
|
| jammy |
Released
(1.19.2-2ubuntu0.1)
|
|
| kinetic |
Released
(1.20-1ubuntu0.1)
|
|
| lunar |
Not vulnerable
(1.20.1-1build1)
|
|
| mantic |
Not vulnerable
(1.20.1-1build1)
|
|
| trusty |
Released
(1.12+dfsg-2ubuntu5.4+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(1.20.1-1, 1.20.1, 1.19.4)
|
|
| xenial |
Released
(1.13.2+dfsg-5ubuntu2.2+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 upstream: https://github.com/krb5/krb5/commit/b99de751dd35360c0fccac74a40f4a60dbf1ceea upstream: https://github.com/krb5/krb5/commit/4e661f0085ec5f969c76c0896a34322c6c432de4 |
||
| Binaries built from this source package are in Universe and so are supported by the community. | ||
|
samba Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| focal |
Released
(2:4.15.13+dfsg-0ubuntu0.20.04.1)
|
|
| jammy |
Released
(2:4.15.13+dfsg-0ubuntu1)
|
|
| kinetic |
Released
(2:4.16.8+dfsg-0ubuntu1)
|
|
| lunar |
Not vulnerable
(2:4.17.3+dfsg-3ubuntu1)
|
|
| mantic |
Not vulnerable
(2:4.17.3+dfsg-3ubuntu1)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(2:4.17.3+dfsg-1,4.17.3,4.16.7,4.15.12)
|
|
| xenial |
Needs triage
|
|
|
Patches: upstream: https://git.samba.org/?p=samba.git;a=commit;h=a8ef840d4362d3ffeab13c1d5fea417511b727c2 upstream: https://git.samba.org/?p=samba.git;a=commit;h=8369aee33a0b3de10485dc72223f4653585e3a79 upstream: https://git.samba.org/?p=samba.git;a=commit;h=f792d3e3906414d836d186ec279586c13a83ba8d upstream: https://git.samba.org/?p=samba.git;a=commit;h=9c909c57ce7abacd96ba18173a9dc4ba9a7c0230 upstream: https://git.samba.org/?p=samba.git;a=commit;h=a3816433ae971830c2b16b366b10283aeb5a87b5 upstream: https://git.samba.org/?p=samba.git;a=commit;h=f3672577a8e15b7937d0067a262d04df632dade9 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://www.samba.org/samba/security/CVE-2022-42898.html
- https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
- https://ubuntu.com/security/notices/USN-5800-1
- https://ubuntu.com/security/notices/USN-5822-1
- https://ubuntu.com/security/notices/USN-5822-2
- https://ubuntu.com/security/notices/USN-5828-1
- https://ubuntu.com/security/notices/USN-5936-1
- https://www.cve.org/CVERecord?id=CVE-2022-42898
- NVD
- Launchpad
- Debian