Red Hat: CVE-2021-20254: CVE-2021-20254 samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token (Multiple Advisories)
Description
A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
Solution(s)
- redhat-upgrade-ctdb
- redhat-upgrade-ctdb-debuginfo
- redhat-upgrade-ctdb-tests
- redhat-upgrade-ctdb-tests-debuginfo
- redhat-upgrade-libsmbclient
- redhat-upgrade-libsmbclient-debuginfo
- redhat-upgrade-libsmbclient-devel
- redhat-upgrade-libwbclient
- redhat-upgrade-libwbclient-debuginfo
- redhat-upgrade-libwbclient-devel
- redhat-upgrade-python3-samba
- redhat-upgrade-python3-samba-debuginfo
- redhat-upgrade-python3-samba-test
- redhat-upgrade-samba
- redhat-upgrade-samba-client
- redhat-upgrade-samba-client-debuginfo
- redhat-upgrade-samba-client-libs
- redhat-upgrade-samba-client-libs-debuginfo
- redhat-upgrade-samba-common
- redhat-upgrade-samba-common-libs
- redhat-upgrade-samba-common-libs-debuginfo
- redhat-upgrade-samba-common-tools
- redhat-upgrade-samba-common-tools-debuginfo
- redhat-upgrade-samba-dc
- redhat-upgrade-samba-dc-libs
- redhat-upgrade-samba-debuginfo
- redhat-upgrade-samba-debugsource
- redhat-upgrade-samba-devel
- redhat-upgrade-samba-krb5-printing
- redhat-upgrade-samba-krb5-printing-debuginfo
- redhat-upgrade-samba-libs
- redhat-upgrade-samba-libs-debuginfo
- redhat-upgrade-samba-pidl
- redhat-upgrade-samba-python
- redhat-upgrade-samba-python-test
- redhat-upgrade-samba-test
- redhat-upgrade-samba-test-debuginfo
- redhat-upgrade-samba-test-libs
- redhat-upgrade-samba-test-libs-debuginfo
- redhat-upgrade-samba-vfs-glusterfs
- redhat-upgrade-samba-vfs-glusterfs-debuginfo
- redhat-upgrade-samba-winbind
- redhat-upgrade-samba-winbind-clients
- redhat-upgrade-samba-winbind-clients-debuginfo
- redhat-upgrade-samba-winbind-debuginfo
- redhat-upgrade-samba-winbind-krb5-locator
- redhat-upgrade-samba-winbind-krb5-locator-debuginfo
- redhat-upgrade-samba-winbind-modules
- redhat-upgrade-samba-winbind-modules-debuginfo
- redhat-upgrade-samba-winexe
- redhat-upgrade-samba-winexe-debuginfo
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