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CVE-2022-45141

Published: 16 December 2022

Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will issue rc4-hmac encrypted tickets despite the target server supporting better encryption (eg aes256-cts-hmac-sha1-96).

Notes

AuthorNote
mdeslaur
only affects 4.15.x and earlier
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

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
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 Not vulnerable
(2:4.16.4+dfsg-2ubuntu1)
trusty Not vulnerable

upstream
Released (2:4.16.0+dfsg-2,4.15.13)
xenial Needs triage

lunar Not vulnerable
(2:4.17.3+dfsg-3ubuntu2)
mantic Not vulnerable
(2:4.17.3+dfsg-3ubuntu2)
Patches:
upstream: https://git.samba.org/?p=samba.git;a=commit;h=2be27ec1d7f3bfcdcac65bca1db53772535fe7bf (4.15)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=2ea3f2db8087e0a2c4a18c633b039c722cb6f829 (4.15)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H