ubuntu-cve-2020-15238
Vulnerability from osv_ubuntu
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.
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "blueman",
"binary_version": "2.0.4-1ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "blueman",
"purl": "pkg:deb/ubuntu/blueman@2.0.4-1ubuntu2.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.4-1ubuntu2.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0-1ubuntu1",
"2.0.3-1ubuntu1",
"2.0.4-1ubuntu1",
"2.0.4-1ubuntu2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "blueman",
"binary_version": "2.0.5-1ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "blueman",
"purl": "pkg:deb/ubuntu/blueman@2.0.5-1ubuntu1.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.5-1ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.4-1ubuntu3",
"2.0.5-1ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "blueman",
"binary_version": "2.1.2-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "blueman",
"purl": "pkg:deb/ubuntu/blueman@2.1.2-1ubuntu0.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.2-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.8-1ubuntu1",
"2.1.1-1",
"2.1.2-1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2020-15238",
"modified": "2025-09-08T16:46:13Z",
"published": "2020-10-27T12:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-15238"
},
{
"type": "REPORT",
"url": "https://github.com/blueman-project/blueman/security/advisories/GHSA-jpc9-mgw6-2xwx"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4605-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4605-2"
},
{
"type": "REPORT",
"url": "https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-15238"
}
],
"related": [
"USN-4605-1",
"USN-4605-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-15238"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.