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Alerts This Week
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Debian Jessie DLA-1754-1 Critical Samba Denial Of Service

debian lts
Calendar Grey April 9, 2019
Dist Debian Esm H88
The Samba security patch rectifies several flaws within Debian Jessie. Crucial update aimed at enhancing SMB/CIFS server reliability.
Various vulnerabilities were discovered in Samba, SMB/CIFS file, print, and login server/client for Unix

Summary

CVE-2017-9461

smbd in Samba had a denial of service vulnerability (fd_open_atomic
infinite loop with high CPU usage and memory consumption) due to
wrongly handling dangling symlinks.

CVE-2018-1050

Samba was vulnerable to a denial of service attack when the RPC
spoolss service was configured to be run as an external daemon.
Missing input sanitization checks on some of the input parameters to
spoolss RPC calls could have caused the print spooler service to
crash.

CVE-2018-1057

On a Samba 4 AD DC the LDAP server of Samba incorrectly validated
permissions to modify passwords over LDAP allowing authenticated
users to change any other users' passwords, including administrative
users and privileged service accounts (eg Domain Controllers).

Thanks to the Ubuntu security team for having backported the rather
invasive changeset to Samba in Ubuntu 14.04 (which we could use to
patch Samba in Debian jessie LTS).

CVE-2019-3880

Read the Full Advisory


Severity
critical
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<pre><font face="Courier">Package: samba
Version: 2:4.2.14+dfsg-0+deb8u12
CVE ID: CVE-2017-9461 CVE-2018-1050 CVE-2018-1057 CVE-2019-3880

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