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SUSE: 2021:1498-1 Critical: Samba Out Of Bounds Read and Buffer Overrun

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Calendar Grey May 4, 2021
Scroller Suse
Urgent Alert for Samba Tackles Various Vulnerabilities on SUSE Platforms. Safeguard Your Infrastructure by Implementing the Most Recent Updates.
An update that solves three vulnerabilities and has three fixes is now available

Summary

This update for samba fixes the following issues: - CVE-2021-20277: Fixed an out of bounds read in ldb_handler_fold (bsc#1183574). - CVE-2021-20254: Fixed a buffer overrun in sids_to_unixids() (bsc#1184677). - CVE-2020-27840: Fixed an unauthenticated remote heap corruption via bad DNs (bsc#1183572). - Avoid free'ing our own pointer in memcache when memcache_trim attempts to reduce cache size (bsc#1179156). - s3-libads: use dns name to open a ldap session (bsc#1184310). - Adjust smbcacls '--propagate-inheritance' feature to align with upstream (bsc#1178469). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - SUSE Manager Server 4.0:

Topics%20covered

Topics Covered

security advisory buffer overflow heap corruption samba patch SUSE unauthenticated access

References

#1178469 #1179156 #1183572 #1183574 #1184310

#1184677

Cross- CVE-2020-27840 CVE-2021-20254 CVE-2021-20277

CVSS scores:

CVE-2020-27840 (SUSE): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE-2021-20254 (SUSE): 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

CVE-2021-20277 (SUSE): 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Affected Products:

SUSE Manager Server 4.0

SUSE Manager Retail Branch Server 4.0

SUSE Manager Proxy 4.0

SUSE Linux Enterprise Server for SAP 15-SP1

SUSE Linux Enterprise Server 15-SP1-LTSS

SUSE Linux Enterprise Server 15-SP1-BCL

SUSE Linux Enterprise High Performance Computing 15-SP1-LTSS

SUSE Linux Enterprise High Performance Computing 15-SP1-ESPOS

SUSE Linux Enterprise High Availab...

Read the Full Advisory

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:1498-1
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow heap corruption samba patch SUSE unauthenticated access

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