{"id":"USN-5142-1","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 correctly sandbox Kerberos\ntickets issues by an RODC. An RODC could print administrator tickets,\ncontrary to expectations. (CVE-2020-25718)\n\nAndrew Bartlett discovered that Samba incorrectly handled Kerberos tickets.\nDelegated administrators could possibly use this issue to impersonate\naccounts, leading to total domain compromise. (CVE-2020-25719)\n\nAndrew Bartlett discovered that Samba did not provide stable AD\nidentifiers to Kerberos acceptors. (CVE-2020-25721)\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\nStefan Metzmacher discovered that Samba incorrectly handled certain large\nDCE/RPC requests. A remote attacker could possibly use this issue to\nbypass signature requirements. (CVE-2021-23192)\n\nWilliam Ross discovered that Samba incorrectly handled memory. A remote\nattacker could use this issue to cause Samba to crash, resulting in a\ndenial of service, or possibly escalate privileges. (CVE-2021-3738)\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":"2026-02-10T04:42:23Z","published":"2021-11-11T13:02:13Z","related":["UBUNTU-CVE-2016-2124","UBUNTU-CVE-2020-25717","UBUNTU-CVE-2020-25718","UBUNTU-CVE-2020-25719","UBUNTU-CVE-2020-25721","UBUNTU-CVE-2020-25722","UBUNTU-CVE-2021-23192","UBUNTU-CVE-2021-3671","UBUNTU-CVE-2021-3738"],"upstream":["CVE-2016-2124","CVE-2020-25717","CVE-2020-25718","CVE-2020-25719","CVE-2020-25721","CVE-2020-25722","CVE-2021-23192","CVE-2021-3671","CVE-2021-3738","UBUNTU-CVE-2016-2124","UBUNTU-CVE-2020-25717","UBUNTU-CVE-2020-25718","UBUNTU-CVE-2020-25719","UBUNTU-CVE-2020-25721","UBUNTU-CVE-2020-25722","UBUNTU-CVE-2021-23192","UBUNTU-CVE-2021-3671","UBUNTU-CVE-2021-3738"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5142-1"},{"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-2020-25718"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25719"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25721"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25722"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3671"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3738"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23192"}],"affected":[{"package":{"name":"samba","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/samba@2:4.13.14+dfsg-0ubuntu0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.13.14+dfsg-0ubuntu0.20.04.1"}]}],"versions":["2:4.10.7+dfsg-0ubuntu2","2:4.10.7+dfsg-0ubuntu3","2:4.11.1+dfsg-3ubuntu1","2:4.11.1+dfsg-3ubuntu2","2:4.11.1+dfsg-3ubuntu4","2:4.11.5+dfsg-1ubuntu1","2:4.11.5+dfsg-1ubuntu2","2:4.11.6+dfsg-0ubuntu1","2:4.11.6+dfsg-0ubuntu1.1","2:4.11.6+dfsg-0ubuntu1.2","2:4.11.6+dfsg-0ubuntu1.3","2:4.11.6+dfsg-0ubuntu1.4","2:4.11.6+dfsg-0ubuntu1.5","2:4.11.6+dfsg-0ubuntu1.6","2:4.11.6+dfsg-0ubuntu1.8","2:4.11.6+dfsg-0ubuntu1.9","2:4.11.6+dfsg-0ubuntu1.10"],"ecosystem_specific":{"binaries":[{"binary_name":"ctdb","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libnss-winbind","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libpam-winbind","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libsmbclient","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libsmbclient-dev","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libwbclient-dev","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"libwbclient0","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"python3-samba","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"registry-tools","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-common","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-common-bin","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-dev","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-dsdb-modules","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-libs","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-testsuite","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"samba-vfs-modules","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"smbclient","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"},{"binary_name":"winbind","binary_version":"2:4.13.14+dfsg-0ubuntu0.20.04.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2016-2124"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-25717"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-25718"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-25719"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-25721"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-25722"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-3671"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-3738"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-23192"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5142-1.json"}}],"schema_version":"1.7.3"}