Ubuntu Security Notice 4605-2 - Vaisha Bernard discovered that blueman did not properly sanitize input on the d-bus interface to blueman-mechanism. A local attacker could possibly use this issue to escalate privileges and run arbitrary code or cause a denial of service. While a previous security update fixed the issue, this update provides additional improvements by enabling PolicyKit authentication for privileged commands. Various other issues were also addressed.
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Ubuntu Security Notice USN-4605-2
November 03, 2020
blueman vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
Summary:
A security improvement has been made to blueman.
Software Description:
- blueman: Graphical bluetooth manager
Details:
Vaisha Bernard discovered that blueman did not properly sanitize input
on the d-bus interface to blueman-mechanism. A local attacker could
possibly use this issue to escalate privileges and run arbitrary code or
cause a denial of service. (CVE-2020-15238)
While a previous security update fixed the issue, this update provides
additional improvements by enabling PolicyKit authentication for
privileged commands.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.10:
blueman 2.1.3-2ubuntu1.1
Ubuntu 20.04 LTS:
blueman 2.1.2-1ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4605-2
https://usn.ubuntu.com/4605-1
https://launchpad.net/bugs/1897287
Package Information:
https://launchpad.net/ubuntu/+source/blueman/2.1.3-2ubuntu1.1
https://launchpad.net/ubuntu/+source/blueman/2.1.2-1ubuntu0.2