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OpenAdvisories
Medium ALAS2-2021-1680 1 CVE

Moderate: samba security update (Amazon Linux 2)

Published Jul 1, 2021 · Updated Jul 1, 2021

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2021-20254: 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. 1949442: CVE-2021-20254 samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token

Fixed packages 28

ReleasePackageFixed in
Amazon Linux · 2 ctdb 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 ctdb-tests 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 libsmbclient 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 libsmbclient-devel 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 libwbclient 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 libwbclient-devel 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-client 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-client-libs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-common 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-common-libs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-common-tools 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-dc 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-dc-libs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-debuginfo 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-devel 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-krb5-printing 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-libs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-pidl 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-python 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-python-test 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-test 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-test-libs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-vfs-glusterfs 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-winbind 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-winbind-clients 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-winbind-krb5-locator 0:4.10.16-15.amzn2.0.1
Amazon Linux · 2 samba-winbind-modules 0:4.10.16-15.amzn2.0.1

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2021-20254.html