CVE-2018-19788 Integer overflow in n/a
High 8.8
Published
Updated
Check this codebase for CVE-2018-19788 and fix it if it is affected.
What it is: CVE-2018-19788 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-19788 exists.
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-2018-19788/ (Markdown: https://insights.sbomify.com/CVE-2018-19788/index.md)
A user with a UID greater than INT_MAX can execute arbitrary systemctl commands, leading to privilege escalation on Linux systems using PolicyKit.
- 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-2018-19788?
CVE-2018-19788 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in PolicyKit (aka polkit) 0.115 that allows a user with a uid greater than INT_MAX to successfully execute any systemctl command.
Weakness: CWE-20
Which versions are affected by CVE-2018-19788?
It affects 3 products.
Linux distribution packages (40)
polkit Red Hat:enterprise_linux:7::client | All versions | 0:0.112-22.el7 |
polkit-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:0.112-22.el7 |
polkit-devel Red Hat:enterprise_linux:7::client | All versions | 0:0.112-22.el7 |
polkit-docs Red Hat:enterprise_linux:7::client | All versions | 0:0.112-22.el7 |
polkit Red Hat:enterprise_linux:7::computenode | All versions | 0:0.112-22.el7 |
polkit-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:0.112-22.el7 |
polkit-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:0.112-22.el7 |
polkit-docs Red Hat:enterprise_linux:7::computenode | All versions | 0:0.112-22.el7 |
polkit Red Hat:enterprise_linux:7::server | All versions | 0:0.112-22.el7 |
polkit-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:0.112-22.el7 |
polkit-devel Red Hat:enterprise_linux:7::server | All versions | 0:0.112-22.el7 |
polkit-docs Red Hat:enterprise_linux:7::server | All versions | 0:0.112-22.el7 |
polkit Red Hat:enterprise_linux:7::workstation | All versions | 0:0.112-22.el7 |
polkit-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:0.112-22.el7 |
polkit-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:0.112-22.el7 |
polkit-docs Red Hat:enterprise_linux:7::workstation | All versions | 0:0.112-22.el7 |
polkit Red Hat:rhel_eus:7.6::computenode | All versions | 0:0.112-18.el7_6.2 |
polkit-debuginfo Red Hat:rhel_eus:7.6::computenode | All versions | 0:0.112-18.el7_6.2 |
polkit-devel Red Hat:rhel_eus:7.6::computenode | All versions | 0:0.112-18.el7_6.2 |
polkit-docs Red Hat:rhel_eus:7.6::computenode | All versions | 0:0.112-18.el7_6.2 |
polkit Red Hat:rhel_eus:7.6::server | All versions | 0:0.112-18.el7_6.2 |
polkit-debuginfo Red Hat:rhel_eus:7.6::server | All versions | 0:0.112-18.el7_6.2 |
polkit-devel Red Hat:rhel_eus:7.6::server | All versions | 0:0.112-18.el7_6.2 |
polkit-docs Red Hat:rhel_eus:7.6::server | All versions | 0:0.112-18.el7_6.2 |
polkit SUSE:Enterprise Storage 4 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Desktop 12 SP4 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Module for Basesystem 15 | All versions | 0.114-3.6.1 |
polkit SUSE:Linux Enterprise Server 12 SP1-LTSS | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server 12 SP2-LTSS | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server 12 SP3 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server 12 SP4 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server 12-LTSS | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server for SAP Applications 12 SP1 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 0.113-5.15.1 |
polkit SUSE:Linux Enterprise Software Development Kit 12 SP4 | All versions | 0.113-5.15.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Polkit Project Polkit.
How do I fix CVE-2018-19788?
Apply the vendor's patch.
Is CVE-2018-19788 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-19788 exists.
Public exploit code: 4 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-19788, DEBIAN-CVE-2018-19788, DSA-4350-1, GHSA-4569-2jp2-r7vf, RHSA-2019:2046, RHSA-2019:3232 and 6 more.