Bug 2154376 (CVE-2022-45141)

Summary: CVE-2022-45141 samba: Samba AD DC using Heimdal can be forced to issue rc4-hmac encrypted Kerberos tickets
Product: [Other] Security Response Reporter: Marco Benatto <mbenatto>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: 2545741870, abokovoy, anoopcs, asn, dkarpele, gdeschner, jarrpa, pfilipen, rhs-smb
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: samba 4.15.13, samba 4.16.8, samba 4.15.13 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-12-16 20:23:42 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2154377, 2154378, 2154379, 2154380, 2154381, 2154382, 2154383, 2154384, 2154385, 2154386, 2154387    
Bug Blocks: 2154280, 2175304    

Description Marco Benatto 2022-12-16 17:52:43 UTC 
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).
Comment 1 Marco Benatto 2022-12-16 17:53:53 UTC 
Created samba tracking bugs for this issue:

Affects: fedora-all [bug 2154377]