Executive Summary

Title dbus security update
Name DSA-4462 First vendor Publication 2019-06-13
Vendor Debian Last vendor Modification 2019-06-13
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:N)
Cvss Base Score 3.6 Attack Range Local
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


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

Original Source

Url : http://www.debian.org/security/2019/dsa-4462

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-59 Improper Link Resolution Before File Access ('Link Following')

CPE : Common Platform Enumeration

Application 125
Os 4

Alert History

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Date Informations
2019-06-14 00:19:33
  • First insertion