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samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token

🗓️ 30 Nov 2021 15:57:14Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Samba smbd maps Windows SIDs to Unix GIDs due to negative idmap cache entries, risking token data.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: Multiple Samba vulnerability issues in IBM Storwize V7000 Unified
14 Oct 202116:55
–ibm
ibm
IBM Security Bulletins		Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2021-20254)
6 Dec 202114:13
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Vulnerabilities in Samba, OpenSSL, Python, and XStream affect IBM Spectrum Protect Plus (CVE-2021-20254, CVE-2021-3712, CVE-2021-43859, CVE-2022-0778, CVE-2020-25717, CVE-2021-23192, CVE-2021-3733)
30 Jun 202203:51
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Samba for IBM i is affected by CVE-2021-20254
13 May 202114:26
–ibm
freebsd
FreeBSD		samba -- negative idmap cache entries vulnerability
29 Apr 202100:00
–freebsd
nessus
Tenable Nessus		Amazon Linux 2 : samba (ALAS-2021-1680)
1 Jul 202100:00
–nessus
nessus
Tenable Nessus		Amazon Linux AMI : samba (ALAS-2022-1564)
19 Feb 202200:00
–nessus
nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0077: samba (ALINUX3-SA-2021:0077)
14 May 202500:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : samba (ALSA-2021:4058)
9 Feb 202200:00
–nessus
nessus
Tenable Nessus		Azure Linux 3.0 Security Update: samba (CVE-2021-20254)
22 Jan 202600:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.2aarch64ctdb4.11.2-15.el8_2ctdb-4.11.2-15.el8_2.aarch64.rpm
Red Hat Enterprise Linux8.2ppc64lectdb4.11.2-15.el8_2ctdb-4.11.2-15.el8_2.ppc64le.rpm
Red Hat Enterprise Linux8.2s390xctdb4.11.2-15.el8_2ctdb-4.11.2-15.el8_2.s390x.rpm
Red Hat Enterprise Linux8.2x86_64ctdb4.11.2-15.el8_2ctdb-4.11.2-15.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2aarch64ctdb-debuginfo4.11.2-15.el8_2ctdb-debuginfo-4.11.2-15.el8_2.aarch64.rpm
Red Hat Enterprise Linux8.2i686ctdb-debuginfo4.11.2-15.el8_2ctdb-debuginfo-4.11.2-15.el8_2.i686.rpm
Red Hat Enterprise Linux8.2ppc64lectdb-debuginfo4.11.2-15.el8_2ctdb-debuginfo-4.11.2-15.el8_2.ppc64le.rpm
Red Hat Enterprise Linux8.2s390xctdb-debuginfo4.11.2-15.el8_2ctdb-debuginfo-4.11.2-15.el8_2.s390x.rpm
Red Hat Enterprise Linux8.2x86_64ctdb-debuginfo4.11.2-15.el8_2ctdb-debuginfo-4.11.2-15.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2aarch64ctdb-tests4.11.2-15.el8_2ctdb-tests-4.11.2-15.el8_2.aarch64.rpm
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25 Jun 2026 10:59Current
7.3High risk
Vulners AI Score7.3
CVSS 24.9
CVSS 3.16.8
EPSS0.01616
CWE-125
samba serverid mapping cachewindows security identifiersunix group identifiersprocess tokengroup membershipdata confidentialitydata integrity
5