The Samba-Bugzilla – Attachment 13978 Details for
Bug 13272
[SECURITY] CVE-2018-1057: Unprivileged user can change any user (and admin) password
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Proposed advisory text
CVE-2018-1057-advisory-v1.txt (text/plain), 1.59 KB, created by
Ralph Böhme
on 2018-02-23 14:48:54 UTC
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Description:
Proposed advisory text
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Creator:
Ralph Böhme
Created:
2018-02-23 14:48:54 UTC
Size:
1.59 KB
patch
obsolete
>==================================================================== >== Subject: Authenticated users can change other users password >== >== CVE ID#: CVE-2018-1057 >== >== Versions: All versions of Samba from 4.0.0 onwards. >== >== Summary: On a Samba 4 AD DC any authenticated user can change >== other users passwords over LDAP, including the >== passwords of administrative users. >== >==================================================================== > >=========== >Description >=========== > >On a Samba 4 AD DC the LDAP server in all versions of Samba from >4.0.0 onwards incorrectly validates permissions to modify passwords >over LDAP allowing authenticated users to change any other users >passwords, including administrative users. > >================== >Patch Availability >================== > >A patch addressing this defect has been posted to > > https://www.samba.org/samba/security/ > >Additionally, Samba 4.7.x, 4.6.y and 4.5.z have been issued as >security releases to correct the defect. Patches against older Samba >versions may be available at https://samba.org/samba/patches/. Samba >vendors and administrators running affected versions are advised to >upgrade or apply the patch as soon as possible. > >========== >Workaround >========== > >Rewoke the change passwords right for everyone from all user objects >(including computers) in the directory. Note that this will prevent >users from being able to change their own expired passwords. > >======= >Credits >======= > >This problem was found by Björn Baumbach from Sernet. Ralph Böhme and >Stefan Metzmacher from SerNet and the Samba Team provided the fix.
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