CVE-2020-15238 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2020-15238 Interim 1 14 2023-09-06T23:59:38Z current 2021-05-30T14:41:56Z 2023-09-06T23:59:38Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2020-15238 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. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/76TEVIDBCJFLHPLRZ5MVJSBDA4ETTWSP/ E-Mail link for openSUSE-SU-2020:1997-1 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ZRBKJO47KUXI63HQ5CAXONKVOHGJMORZ/ E-Mail link for openSUSE-SU-2020:2024-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Package Hub 15 SP2 openSUSE Leap 15.2 openSUSE Tumbleweed blueman-2.1.4-bp152.2.6.1 blueman-2.1.4-lp152.2.3.1 blueman-2.2.1-1.2 blueman-lang-2.1.4-bp152.2.6.1 blueman-lang-2.1.4-lp152.2.3.1 blueman-lang-2.2.1-1.2 caja-extension-sendto-blueman-2.2.1-1.2 nautilus-extension-sendto-blueman-2.2.1-1.2 nemo-extension-sendto-blueman-2.2.1-1.2 thunar-sendto-blueman-2.1.4-bp152.2.6.1 thunar-sendto-blueman-2.1.4-lp152.2.3.1 thunar-sendto-blueman-2.2.1-1.2 blueman-2.1.4-bp152.2.6.1 as a component of SUSE Package Hub 15 SP2 blueman-lang-2.1.4-bp152.2.6.1 as a component of SUSE Package Hub 15 SP2 thunar-sendto-blueman-2.1.4-bp152.2.6.1 as a component of SUSE Package Hub 15 SP2 blueman-2.1.4-lp152.2.3.1 as a component of openSUSE Leap 15.2 blueman-lang-2.1.4-lp152.2.3.1 as a component of openSUSE Leap 15.2 thunar-sendto-blueman-2.1.4-lp152.2.3.1 as a component of openSUSE Leap 15.2 blueman-2.2.1-1.2 as a component of openSUSE Tumbleweed blueman-lang-2.2.1-1.2 as a component of openSUSE Tumbleweed caja-extension-sendto-blueman-2.2.1-1.2 as a component of openSUSE Tumbleweed nautilus-extension-sendto-blueman-2.2.1-1.2 as a component of openSUSE Tumbleweed nemo-extension-sendto-blueman-2.2.1-1.2 as a component of openSUSE Tumbleweed thunar-sendto-blueman-2.2.1-1.2 as a component of openSUSE Tumbleweed 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. CVE-2020-15238 SUSE Package Hub 15 SP2:blueman-2.1.4-bp152.2.6.1 SUSE Package Hub 15 SP2:blueman-lang-2.1.4-bp152.2.6.1 SUSE Package Hub 15 SP2:thunar-sendto-blueman-2.1.4-bp152.2.6.1 openSUSE Leap 15.2:blueman-2.1.4-lp152.2.3.1 openSUSE Leap 15.2:blueman-lang-2.1.4-lp152.2.3.1 openSUSE Leap 15.2:thunar-sendto-blueman-2.1.4-lp152.2.3.1 openSUSE Tumbleweed:blueman-2.2.1-1.2 openSUSE Tumbleweed:blueman-lang-2.2.1-1.2 openSUSE Tumbleweed:caja-extension-sendto-blueman-2.2.1-1.2 openSUSE Tumbleweed:nautilus-extension-sendto-blueman-2.2.1-1.2 openSUSE Tumbleweed:nemo-extension-sendto-blueman-2.2.1-1.2 openSUSE Tumbleweed:thunar-sendto-blueman-2.2.1-1.2 moderate 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H