USN-5174-1

Dashboard / Vulnerabilities / USN-5174-1

USN-5174-1

Summary: samba vulnerabilities

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

References: https://ubuntu.com/security/notices/USN-5174-1, 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