CVE-2020-0556 Privilege escalation in BlueZ
High 7.1
Published
Updated
Check this codebase for CVE-2020-0556 and fix it if it is affected.
What it is: CVE-2020-0556 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-0556 in the wild and no public exploit code.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2020-0556/ (Markdown: https://insights.sbomify.com/CVE-2020-0556/index.md)
An unauthenticated attacker with adjacent access can escalate privileges or cause denial of service in the BlueZ Bluetooth subsystem.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-0556?
CVE-2020-0556 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper access control in subsystem for BlueZ before version 5.54 may allow an unauthenticated user to potentially enable escalation of privilege and denial of service via adjacent access
Which versions are affected by CVE-2020-0556?
It affects 4 products.
Linux distribution packages (40)
bluez Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez-cups Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez-hid2hci Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez-libs Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez-libs-devel Red Hat:enterprise_linux:7::client | All versions | 0:5.44-7.el7 |
bluez Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez-cups Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez-hid2hci Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez-libs Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez-libs-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:5.44-7.el7 |
bluez Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez-cups Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez-hid2hci Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez-libs Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez-libs-devel Red Hat:enterprise_linux:7::server | All versions | 0:5.44-7.el7 |
bluez Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-cups Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-hid2hci Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-libs Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-libs-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:5.44-7.el7 |
bluez-cups Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-cups-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-hid2hci-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez-obexd-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.50-4.el8 |
bluez Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-cups-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-hid2hci Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-hid2hci-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-libs Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
bluez-obexd Red Hat:enterprise_linux:8::baseos | All versions | 0:5.50-4.el8 |
Products include Bluez Bluez, Canonical Ubuntu Linux, Debian Debian Linux, Opensuse Leap.
How do I fix CVE-2020-0556?
Upgrade to a fixed version.
Is CVE-2020-0556 being exploited?
There is no known exploitation of CVE-2020-0556 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2020-0556, CLEANSTART-2026-VA16000, DEBIAN-CVE-2020-0556, DLA-2240-1, DSA-4647-1, GHSA-xjj6-3w9q-h5xv and 7 more.