Arbitrary Code Injection Affecting blueman package, versions <2.1.4-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

Exploit Maturity
Mature
EPSS
0.06% (28th percentile)

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  • Snyk IDSNYK-DEBIAN13-BLUEMAN-5675827
  • published28 Oct 2020
  • disclosed27 Oct 2020

Introduced: 27 Oct 2020

CVE-2020-15238  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Debian:13 blueman to version 2.1.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream blueman package and not the blueman package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

Blueman is a GTK+ Bluetooth Manager. In Blueman before 2.1.4, the DhcpClient method of the D-Bus interface to blueman-mechanism is prone to an argument injection vulnerability. The impact highly depends on the system configuration. If Polkit-1 is disabled and for versions lower than 2.0.6, any local user can possibly exploit this. If Polkit-1 is enabled for version 2.0.6 and later, a possible attacker needs to be allowed to use the org.blueman.dhcp.client action. That is limited to users in the wheel group in the shipped rules file that do have the privileges anyway. On systems with ISC DHCP client (dhclient), attackers can pass arguments to ip link with the interface name that can e.g. be used to bring down an interface or add an arbitrary XDP/BPF program. On systems with dhcpcd and without ISC DHCP client, attackers can even run arbitrary scripts by passing -c/path/to/script as an interface name. Patches are included in 2.1.4 and master that change the DhcpClient D-Bus method(s) to accept BlueZ network object paths instead of network interface names. A backport to 2.0(.8) is also available. As a workaround, make sure that Polkit-1-support is enabled and limit privileges for the org.blueman.dhcp.client action to users that are able to run arbitrary commands as root anyway in /usr/share/polkit-1/rules.d/blueman.rules.

CVSS Scores

version 3.1