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  • [SECURITY] [DSA 5015-1] samba security update

    From Salvatore Bonaccorso@21:1/5 to All on Tue Nov 30 13:30:01 2021
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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-5015-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso November 30, 2021 https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : samba
    CVE ID : CVE-2020-25717

    Andrew Bartlett discovered that Samba, a SMB/CIFS file, print, and login
    server for Unix, may map domain users to local users in an undesired
    way. This could allow a user in an AD domain to potentially become root
    on domain members.

    A new parameter "min domain uid" (default 1000) has been added to
    specify the minimum uid allowed when mapping a local account to a domain account.

    Further details and workarounds can be found in the upstream advisory https://www.samba.org/samba/security/CVE-2020-25717.html

    For the oldstable distribution (buster), this problem has been fixed
    in version 2:4.9.5+dfsg-5+deb10u2. Additionally the update mitigates CVE-2020-25722. Unfortunately the changes required to fix additional
    CVEs affecting Samba as an AD-compatible domain controller are too
    invasive to be backported. Thus users using Samba as an AD-compatible
    domain controller are encouraged to migrate to Debian bullseye. From
    this point onwards AD domain controller setups are no longer supported
    in Debian oldstable.

    We recommend that you upgrade your samba packages.

    For the detailed security status of samba please refer to its security
    tracker page at:
    https://security-tracker.debian.org/tracker/samba

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org
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