CVE-2020-25717 Privilege escalation in samba
High 8.1
Published
Updated
Check this codebase for CVE-2020-25717 and fix it if it is affected.
What it is: CVE-2020-25717 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 18 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-25717 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-2020-25717/ (Markdown: https://insights.sbomify.com/CVE-2020-25717/index.md)
An authenticated attacker can exploit a flaw in Samba's domain user mapping to achieve privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-25717?
CVE-2020-25717 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 18 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.
Weakness: CWE-20
Which versions are affected by CVE-2020-25717?
It affects 25 products.
Linux distribution packages (40)
redhat-virtualization-host Red Hat:rhev_hypervisor:4.4::el8 | All versions | 0:4.4.9-202201072228_8.5 |
redhat-virtualization-host-image-update Red Hat:rhev_hypervisor:4.4::el8 | All versions | 0:4.4.9-202201072228_8.5 |
samba SUSE:Enterprise Storage 6 | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Enterprise Storage 7 | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:HPE Helion OpenStack 8 | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise High Availability Extension 12 SP4 | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise High Availability Extension 12 SP5 | All versions | 4.10.18+git.344.93a2ffaacec-3.44.2 |
samba SUSE:Linux Enterprise High Availability Extension 15 | All versions | 4.7.11+git.358.cb5ede6f1e5-4.60.2 |
samba SUSE:Linux Enterprise High Availability Extension 15 SP1 | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise High Availability Extension 15 SP2 | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise High Availability Extension 15 SP3 | All versions | 4.13.13+git.531.903f5c0ccdc-3.17.1 |
samba SUSE:Linux Enterprise High Availability Extension 15 SP3 | All versions | 4.13.13+git.539.fdbc44a8598-3.20.2 |
samba SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 4.7.11+git.358.cb5ede6f1e5-4.60.2 |
samba SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 4.7.11+git.358.cb5ede6f1e5-4.60.2 |
samba SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 4.13.13+git.531.903f5c0ccdc-3.17.1 |
samba SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 4.13.13+git.539.fdbc44a8598-3.20.2 |
samba SUSE:Linux Enterprise Module for Python 2 15 SP2 | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise Module for Python 2 15 SP3 | All versions | 4.13.13+git.531.903f5c0ccdc-3.17.1 |
samba SUSE:Linux Enterprise Module for Python 2 15 SP3 | All versions | 4.13.13+git.539.fdbc44a8598-3.20.2 |
samba SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.10.18+git.344.93a2ffaacec-3.44.2 |
samba SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise Server 15 SP2-BCL | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
samba SUSE:Linux Enterprise Server 15-LTSS | All versions | 4.7.11+git.358.cb5ede6f1e5-4.60.2 |
samba SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 4.6.16+git.313.502515a5bfc-3.67.2 |
samba SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.10.18+git.344.93a2ffaacec-3.44.2 |
samba SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 4.7.11+git.358.cb5ede6f1e5-4.60.2 |
samba SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 4.9.5+git.477.8163dd03413-3.61.1 |
samba SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 4.11.14+git.313.d4e302805e1-4.32.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Redhat Codeready Linux Builder, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop and 19 more.
How do I fix CVE-2020-25717?
Apply the vendor's patch.
Is CVE-2020-25717 being exploited?
There is no known exploitation of CVE-2020-25717 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2020-25717, AZL-36993, AZL-8650, CLSA-2022-1648067906, CLSA-2025-1759419790, CLSA-2025-1759433716 and 16 more.