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Amazon Linux AMI 2: CVE-2021-20254: Security patch for samba (ALAS-2021-1680)

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Amazon Linux AMI 2: CVE-2021-20254: Security patch for samba (ALAS-2021-1680)

Severity
5
CVSS
(AV:N/AC:M/Au:S/C:P/I:P/A:N)
Published
05/05/2021
Created
07/02/2021
Added
07/02/2021
Modified
09/30/2022

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)

  • amazon-linux-ami-2-upgrade-ctdb
  • amazon-linux-ami-2-upgrade-ctdb-tests
  • amazon-linux-ami-2-upgrade-libsmbclient
  • amazon-linux-ami-2-upgrade-libsmbclient-devel
  • amazon-linux-ami-2-upgrade-libwbclient
  • amazon-linux-ami-2-upgrade-libwbclient-devel
  • amazon-linux-ami-2-upgrade-samba
  • amazon-linux-ami-2-upgrade-samba-client
  • amazon-linux-ami-2-upgrade-samba-client-libs
  • amazon-linux-ami-2-upgrade-samba-common
  • amazon-linux-ami-2-upgrade-samba-common-libs
  • amazon-linux-ami-2-upgrade-samba-common-tools
  • amazon-linux-ami-2-upgrade-samba-dc
  • amazon-linux-ami-2-upgrade-samba-dc-libs
  • amazon-linux-ami-2-upgrade-samba-debuginfo
  • amazon-linux-ami-2-upgrade-samba-devel
  • amazon-linux-ami-2-upgrade-samba-krb5-printing
  • amazon-linux-ami-2-upgrade-samba-libs
  • amazon-linux-ami-2-upgrade-samba-pidl
  • amazon-linux-ami-2-upgrade-samba-python
  • amazon-linux-ami-2-upgrade-samba-python-test
  • amazon-linux-ami-2-upgrade-samba-test
  • amazon-linux-ami-2-upgrade-samba-test-libs
  • amazon-linux-ami-2-upgrade-samba-vfs-glusterfs
  • amazon-linux-ami-2-upgrade-samba-winbind
  • amazon-linux-ami-2-upgrade-samba-winbind-clients
  • amazon-linux-ami-2-upgrade-samba-winbind-krb5-locator
  • amazon-linux-ami-2-upgrade-samba-winbind-modules

References

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