drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Samba (Aktualisierung)
Name: |
Mehrere Probleme in Samba (Aktualisierung) |
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ID: |
USN-5142-2 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 20.04 LTS, Ubuntu 21.04, Ubuntu 21.10 |
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Datum: |
Mo, 6. Dezember 2021, 21:34 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25718
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3738
https://bugzilla.samba.org/show_bug.cgi?id=14901
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=14918
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25722
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25721
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23192
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25719
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2124 |
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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) --===============6004148796918770747== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="spNls2KxEC63bV9aBAMZKiKjlXcSeSfyV"
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --spNls2KxEC63bV9aBAMZKiKjlXcSeSfyV Content-Type: multipart/mixed; boundary="1XA97x2qJXVIGRGAKi9jzyg9ksWu8E9Ix"; 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: <09e79078-b819-67d2-2698-19a0fa528a44@canonical.com> Subject: [USN-5142-2] Samba regressions
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========================================================================== Ubuntu Security Notice USN-5142-2 December 06, 2021
samba regressions ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10 - Ubuntu 21.04 - Ubuntu 20.04 LTS
Summary:
USN-5142-1 introduced regressions in Samba.
Software Description: - samba: SMB/CIFS file, print, and login server for Unix
Details:
USN-5142-1 fixed vulnerabilities in Samba. Some of the upstream changes introduced regressions in name mapping and backups.
Please see the following upstream bugs for more information: https://bugzilla.samba.org/show_bug.cgi?id=14901 https://bugzilla.samba.org/show_bug.cgi?id=14918
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 correctly sandbox Kerberos tickets issues by an RODC. An RODC could print administrator tickets, contrary to expectations. (CVE-2020-25718) Andrew Bartlett discovered that Samba incorrectly handled Kerberos tickets. Delegated administrators could possibly use this issue to impersonate accounts, leading to total domain compromise. (CVE-2020-25719) Andrew Bartlett discovered that Samba did not provide stable AD identifiers to Kerberos acceptors. (CVE-2020-25721) 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) Stefan Metzmacher discovered that Samba incorrectly handled certain large DCE/RPC requests. A remote attacker could possibly use this issue to bypass signature requirements. (CVE-2021-23192) William Ross discovered that Samba incorrectly handled memory. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly escalate privileges. (CVE-2021-3738) 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 21.10: samba 2:4.13.14+dfsg-0ubuntu0.21.10.3
Ubuntu 21.04: samba 2:4.13.14+dfsg-0ubuntu0.21.04.3
Ubuntu 20.04 LTS: samba 2:4.13.14+dfsg-0ubuntu0.20.04.3
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5142-2 https://ubuntu.com/security/notices/USN-5142-1 https://launchpad.net/bugs/1950363, https://launchpad.net/bugs/1952187
Package Information: https://launchpad.net/ubuntu/+source/samba/2:4.13.14+dfsg-0ubuntu0.21.10.3 https://launchpad.net/ubuntu/+source/samba/2:4.13.14+dfsg-0ubuntu0.21.04.3 https://launchpad.net/ubuntu/+source/samba/2:4.13.14+dfsg-0ubuntu0.20.04.3
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