CVE-2020-15238 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.0 HIGH
Vector:  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score:  7.1 HIGH
Vector:  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://packetstormsecurity.com/files/159740/Blueman-Local-Root-Privilege-Escalation.html Exploit  Third Party Advisory  VDB Entry 
https://bugs.launchpad.net/ubuntu/+source/blueman/+bug/1897287 Exploit  Issue Tracking  Third Party Advisory 
https://github.com/blueman-project/blueman/releases/tag/2.1.4 Third Party Advisory 
https://github.com/blueman-project/blueman/security/advisories/GHSA-jpc9-mgw6-2xwx Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/11/msg00005.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3F4EQU6CAPBKAPJ42HTB473NJLXFKB32/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6CFLMNHAHX5HPIKC5IG6F25HO5Z6RH2N/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W52NP7HRFTNAVNZLGKY4GR3JIZG5KKGS/
https://security.gentoo.org/glsa/202011-11
https://www.debian.org/security/2020/dsa-4781 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Provider acceptance level GitHub, Inc.  

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-15238
NVD Published Date:
10/27/2020
NVD Last Modified:
11/11/2020
Source:
GitHub, Inc.