- Vulnerability/
- USN-5174-1
USN-5174-1: Samba vulnerabilities
First published: Mon Dec 06 2021(Updated: )
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
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/samba | <2:4.7.6+dfsg~ubuntu-0ubuntu2.26 | 2:4.7.6+dfsg~ubuntu-0ubuntu2.26 |
| =18.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2016-2124
- https://ubuntu.com/security/CVE-2020-25717
- https://ubuntu.com/security/CVE-2020-25722
- https://ubuntu.com/security/CVE-2021-3671
- https://ubuntu.com/security/notices/USN-5142-1
- https://ubuntu.com/security/notices/USN-5675-1
- https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.26
- https://ubuntu.com/security/notices/USN-5174-1 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
Frequently Asked Questions
What is the vulnerability ID of this security advisory?
The vulnerability ID of this security advisory is USN-5174-1.
What software is affected by this vulnerability?
The Samba software is affected by this vulnerability.
What is the severity of USN-5174-1?
The severity of USN-5174-1 is not specified in the provided information.
How can the vulnerability be exploited?
The vulnerability can be exploited by a remote attacker who can possibly downgrade connections to plaintext authentication.
Is there a fix available for this vulnerability?
Yes, a fix for this vulnerability is available. Please refer to the provided reference links for more information.
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- source/Ubuntu
- anchor-related/USN-5142-1
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- version/ubuntu ubuntu/18.04