Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2019.2107.2
dbus security update
17 June 2019
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AusCERT Security Bulletin Summary
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Product: dbus
Publisher: Debian
Operating System: Debian GNU/Linux 9
Debian GNU/Linux 8
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12749
Reference: ESB-2019.2080.2
Original Bulletin:
http://www.debian.org/security/2019/dsa-4462
https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html
Comment: This bulletin contains two (2) Debian security advisories.
Revision History: June 17 2019: Added Debian 8 update
June 14 2019: Initial Release
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Debian Security Advisory DSA-4462-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
June 13, 2019 https://www.debian.org/security/faq
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Package : dbus
CVE ID : CVE-2019-12749
Debian Bug : 930375
Joe Vennix discovered an authentication bypass vulnerability in dbus, an
asynchronous inter-process communication system. The implementation of
the DBUS_COOKIE_SHA1 authentication mechanism was susceptible to a
symbolic link attack. A local attacker could take advantage of this flaw
to bypass authentication and connect to a DBusServer with elevated
privileges.
The standard system and session dbus-daemons in their default
configuration are not affected by this vulnerability.
The vulnerability was addressed by upgrading dbus to a new upstream
version 1.10.28 which includes additional fixes.
For the stable distribution (stretch), this problem has been fixed in
version 1.10.28-0+deb9u1.
We recommend that you upgrade your dbus packages.
For the detailed security status of dbus please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/dbus
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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Package : dbus
Version : 1.8.22-0+deb8u2
CVE ID : CVE-2019-12749
Debian Bug : 930375
Joe Vennix discovered an authentication bypass vulnerability in dbus, an
asynchronous inter-process communication system. The implementation of
the DBUS_COOKIE_SHA1 authentication mechanism was susceptible to a
symbolic link attack. A local attacker could take advantage of this flaw
to bypass authentication and connect to a DBusServer with elevated
privileges.
For Debian 8 "Jessie", this problem has been fixed in version
1.8.22-0+deb8u2.
We recommend that you upgrade your dbus packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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