drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Samba (Aktualisierung)
Name: |
Mehrere Probleme in Samba (Aktualisierung) |
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ID: |
USN-5174-2 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 18.04 LTS |
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Datum: |
Di, 14. Dezember 2021, 07:53 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3671
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25717
https://bugzilla.samba.org/show_bug.cgi?id=14922
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2124
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25722 |
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Applikationen: |
Samba |
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Update von: |
Mehrere Probleme in Samba |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============5772198922031602994== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="LChfqBJeaVdcDE7usfjzDdWF6byENBv7S"
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --LChfqBJeaVdcDE7usfjzDdWF6byENBv7S Content-Type: multipart/mixed; boundary="mWU1KwMAyLXSSCkcEwT7dTHMdPeoW84ci"; protected-headers="v1" From: Marc Deslauriers <marc.deslauriers@canonical.com> Reply-To: Ubuntu Security <security@ubuntu.com> To: "ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com> Message-ID: <b90fce49-111a-19a1-2129-91b0a1eca303@canonical.com> Subject: [USN-5174-2] Samba regression
--mWU1KwMAyLXSSCkcEwT7dTHMdPeoW84ci Content-Type: text/plain; charset=utf-8 Content-Language: en-C Content-Transfer-Encoding: quoted-printable
========================================================================== Ubuntu Security Notice USN-5174-2 December 13, 2021
samba regression ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
USN-5174-1 introduced a regression in Samba.
Software Description: - samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-5174-1 fixed vulnerabilities in Samba. Some of the changes introduced a regression in Kerberos authentication in certain environments.
Please see the following upstream bug for more information: https://bugzilla.samba.org/show_bug.cgi?id=14922
This update fixes the problem.
Original advisory details:
Stefan Metzmacher discovered that Samba incorrectly handled SMB1 client connections. A remote attacker could possibly use this issue to downgrade connections to plaintext authentication. (CVE-2016-2124) Andrew Bartlett discovered that Samba incorrectly mapping domain users to local users. An authenticated attacker could possibly use this issue to become root on domain members. (CVE-2020-25717) Andrew Bartlett discovered that Samba did not properly check sensitive attributes. An authenticated attacker could possibly use this issue to escalate privileges. (CVE-2020-25722) Joseph Sutton discovered that Samba incorrectly handled certain TGS requests. An authenticated attacker could possibly use this issue to cause Samba to crash, resulting in a denial of service. (CVE-2021-3671) The fix for CVE-2020-25717 results in possible behaviour changes that could affect certain environments. Please see the upstream advisory for more information: https://www.samba.org/samba/security/CVE-2020-25717.html
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.27
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5174-2 https://ubuntu.com/security/notices/USN-5174-1 https://launchpad.net/bugs/1950363
Package Information: https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.27
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