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samba: SMB1 client connections can be downgraded to plaintext authentication

🗓️ 11 Jan 2022 16:37:24Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Samba SMB1 authentication flaw allows downgrading to plaintext, exposing passwords even with Kerberos.

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Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.2aarch64ctdb0:4.11.2-18.el8_2ctdb-0:4.11.2-18.el8_2.aarch64.rpm
Red Hat Enterprise Linux8.2ppc64lectdb0:4.11.2-18.el8_2ctdb-0:4.11.2-18.el8_2.ppc64le.rpm
Red Hat Enterprise Linux8.2s390xctdb0:4.11.2-18.el8_2ctdb-0:4.11.2-18.el8_2.s390x.rpm
Red Hat Enterprise Linux8.2x86_64ctdb0:4.11.2-18.el8_2ctdb-0:4.11.2-18.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2aarch64ctdb-debuginfo0:4.11.2-18.el8_2ctdb-debuginfo-0:4.11.2-18.el8_2.aarch64.rpm
Red Hat Enterprise Linux8.2i686ctdb-debuginfo0:4.11.2-18.el8_2ctdb-debuginfo-0:4.11.2-18.el8_2.i686.rpm
Red Hat Enterprise Linux8.2ppc64lectdb-debuginfo0:4.11.2-18.el8_2ctdb-debuginfo-0:4.11.2-18.el8_2.ppc64le.rpm
Red Hat Enterprise Linux8.2s390xctdb-debuginfo0:4.11.2-18.el8_2ctdb-debuginfo-0:4.11.2-18.el8_2.s390x.rpm
Red Hat Enterprise Linux8.2x86_64ctdb-debuginfo0:4.11.2-18.el8_2ctdb-debuginfo-0:4.11.2-18.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2aarch64ctdb-tests0:4.11.2-18.el8_2ctdb-tests-0:4.11.2-18.el8_2.aarch64.rpm
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21 Nov 2025 18:27Current
6.8Medium risk
Vulners AI Score6.8
CVSS 24.3
CVSS 3.15.9
EPSS0.00699
3