Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Blueman Project | Blueman | < 2.1.4 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 31 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/159740/Blueman-Local-Root-Privilege-EscalatExploitThird Party AdvisoryVDB Entry
- https://bugs.launchpad.net/ubuntu/+source/blueman/+bug/1897287ExploitIssue TrackingThird Party Advisory
- https://github.com/blueman-project/blueman/releases/tag/2.1.4Third Party Advisory
- https://github.com/blueman-project/blueman/security/advisories/GHSA-jpc9-mgw6-2xThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00005.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202011-11Third Party Advisory
- https://www.debian.org/security/2020/dsa-4781Third Party Advisory
- http://packetstormsecurity.com/files/159740/Blueman-Local-Root-Privilege-EscalatExploitThird Party AdvisoryVDB Entry
- https://bugs.launchpad.net/ubuntu/+source/blueman/+bug/1897287ExploitIssue TrackingThird Party Advisory
- https://github.com/blueman-project/blueman/releases/tag/2.1.4Third Party Advisory
- https://github.com/blueman-project/blueman/security/advisories/GHSA-jpc9-mgw6-2xThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00005.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-15238?
CVE-2020-15238 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 depen...
How severe is CVE-2020-15238?
CVE-2020-15238 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-15238?
Check the references section above for vendor advisories and patch information. Affected products include: Blueman Project Blueman, Debian Debian Linux, Fedoraproject Fedora.