CVE-2022-45141

Publication date 16 December 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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).

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
samba	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Fixed 2:4.15.13+dfsg-0ubuntu1
	20.04 LTS focal	Fixed 2:4.15.13+dfsg-0ubuntu0.20.04.1
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Not affected

Notes

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.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
samba	Upstream: https://git.samba.org/?p=samba.git;a=commit;h=2be27ec1d7f3bfcdcac65bca1db53772535fe7bf Upstream: https://git.samba.org/?p=samba.git;a=commit;h=2ea3f2db8087e0a2c4a18c633b039c722cb6f829

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
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