{"id":"USN-5174-1","summary":"samba vulnerabilities","details":"Stefan Metzmacher discovered that Samba incorrectly handled SMB1 client\nconnections. A remote attacker could possibly use this issue to downgrade\nconnections to plaintext authentication. (CVE-2016-2124)\n\nAndrew Bartlett discovered that Samba incorrectly mapping domain users to\nlocal users. An authenticated attacker could possibly use this issue to\nbecome root on domain members. (CVE-2020-25717)\n\nAndrew Bartlett discovered that Samba did not properly check sensitive\nattributes. An authenticated attacker could possibly use this issue to\nescalate privileges. (CVE-2020-25722)\n\nJoseph Sutton discovered that Samba incorrectly handled certain TGS\nrequests. An authenticated attacker could possibly use this issue to cause\nSamba to crash, resulting in a denial of service. (CVE-2021-3671)\n\nThe fix for CVE-2020-25717 results in possible behaviour changes that could\naffect certain environments. Please see the upstream advisory for more\ninformation:\n\nhttps://www.samba.org/samba/security/CVE-2020-25717.html\n","modified":"2026-02-10T04:42:24Z","published":"2021-12-06T13:29:33Z","related":["UBUNTU-CVE-2016-2124","UBUNTU-CVE-2020-25717","UBUNTU-CVE-2020-25722","UBUNTU-CVE-2021-3671"],"upstream":["CVE-2016-2124","CVE-2020-25717","CVE-2020-25722","CVE-2021-3671","UBUNTU-CVE-2016-2124","UBUNTU-CVE-2020-25717","UBUNTU-CVE-2020-25722","UBUNTU-CVE-2021-3671"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5174-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2124"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25717"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25722"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3671"}],"affected":[{"package":{"name":"samba","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/samba@2:4.7.6+dfsg~ubuntu-0ubuntu2.26?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26"}]}],"versions":["2:4.6.7+dfsg-1ubuntu3","2:4.7.1+dfsg-1ubuntu1","2:4.7.3+dfsg-1ubuntu1","2:4.7.4+dfsg-1ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu2","2:4.7.6+dfsg~ubuntu-0ubuntu2.2","2:4.7.6+dfsg~ubuntu-0ubuntu2.4","2:4.7.6+dfsg~ubuntu-0ubuntu2.5","2:4.7.6+dfsg~ubuntu-0ubuntu2.6","2:4.7.6+dfsg~ubuntu-0ubuntu2.7","2:4.7.6+dfsg~ubuntu-0ubuntu2.9","2:4.7.6+dfsg~ubuntu-0ubuntu2.10","2:4.7.6+dfsg~ubuntu-0ubuntu2.11","2:4.7.6+dfsg~ubuntu-0ubuntu2.13","2:4.7.6+dfsg~ubuntu-0ubuntu2.14","2:4.7.6+dfsg~ubuntu-0ubuntu2.15","2:4.7.6+dfsg~ubuntu-0ubuntu2.16","2:4.7.6+dfsg~ubuntu-0ubuntu2.17","2:4.7.6+dfsg~ubuntu-0ubuntu2.18","2:4.7.6+dfsg~ubuntu-0ubuntu2.19","2:4.7.6+dfsg~ubuntu-0ubuntu2.20","2:4.7.6+dfsg~ubuntu-0ubuntu2.21","2:4.7.6+dfsg~ubuntu-0ubuntu2.23","2:4.7.6+dfsg~ubuntu-0ubuntu2.24"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"ctdb"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libnss-winbind"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libpam-winbind"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libparse-pidl-perl"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libsmbclient"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libsmbclient-dev"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libwbclient-dev"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"libwbclient0"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"python-samba"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"registry-tools"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-common"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-common-bin"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-dev"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-dsdb-modules"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-libs"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-testsuite"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"samba-vfs-modules"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"smbclient"},{"binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.26","binary_name":"winbind"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2016-2124"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-25717"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-25722"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2021-3671"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5174-1.json"}}],"schema_version":"1.7.3"}