CVE-2021-20254
samba-client: Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet Fil...
CVE-2021-20254 is fixed in 37 products on 1 platform, first by ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.23, released April 28, 2021. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0162
76th percentile
Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix(es): * samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token (CVE-2021-20254) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ctdb · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| ctdb · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | ctdb 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| ctdb · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | ctdb 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| ctdb · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| ctdb-tests · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| ctdb-tests · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| libnss-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | libnss-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| libnss-winbind · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | libnss-winbind 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| libpam-winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| libpam-winbind · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | libpam-winbind 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| libparse-pidl-perl · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | libparse-pidl-perl 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| libsmbclient · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| libsmbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| libsmbclient · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | libsmbclient 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| libsmbclient · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| libsmbclient-devel · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| libsmbclient-devel · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| libwbclient · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| libwbclient · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| libwbclient-devel · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| libwbclient-devel · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| libwbclient0 · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | libwbclient0 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| libwbclient0 · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | libwbclient0 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| python-samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | python-samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| python3-samba · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| python3-samba · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | python3-samba 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| python3-samba · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| python3-samba-test · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| python3-samba-test · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| registry-tools · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | registry-tools 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| registry-tools · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | registry-tools 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-client · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-client · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-client-libs · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-client-libs · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-common · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-common · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-common 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-common · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-common 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-common · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-common-bin · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-common-bin 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-common-bin · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-common-bin 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-common-libs · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-common-libs · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-common-tools · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-common-tools · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-devel · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-devel · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-dsdb-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-dsdb-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-dsdb-modules · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-dsdb-modules 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-krb5-printing · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-krb5-printing · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-libs · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-libs · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-libs 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-libs · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-libs 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-libs · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-pidl · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-pidl · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-test · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-test · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-test-libs · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-test-libs · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-testsuite · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-testsuite 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-testsuite · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-testsuite 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-vfs-modules · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | samba-vfs-modules 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| samba-vfs-modules · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | samba-vfs-modules 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| samba-winbind · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-winbind · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-winbind-clients · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-winbind-clients · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-winbind-krb5-locator · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-winbind-krb5-locator · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-winbind-modules · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-winbind-modules · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| samba-winexe · RHEL 8 | 0:4.13.3-5.el8_4 | RHSA-2021:4058 | Nov 2, 2021 |
| samba-winexe · ol 8 | 0:4.13.3-5.el8_4 | ELSA-2021-4058 | Nov 2, 2021 |
| smbclient · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | smbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| smbclient · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | smbclient 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
| winbind · Ubuntu 18.04.6 LTS (bionic) | 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.23 | Apr 28, 2021 |
| winbind · Ubuntu 20.04 LTS (focal) | 2:4.11.6+dfsg-0ubuntu1.8 | winbind 2:4.11.6+dfsg-0ubuntu1.8 | Apr 28, 2021 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.