CVE-2018-1063 Path traversal in policycoreutils
Medium 4.4
Published
Updated
Check this codebase for CVE-2018-1063 and fix it if it is affected.
What it is: CVE-2018-1063 is a medium-severity path traversal vulnerability in Redhat Enterprise Linux, published on 2 Mar 2018. 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-2018-1063 in the wild and no public exploit code.
Affected product: Redhat Enterprise 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-2018-1063/ (Markdown: https://insights.sbomify.com/CVE-2018-1063/index.md)
Local attackers can exploit symbolic links during SELinux relabeling to modify file contexts, potentially bypassing security restrictions and escalating privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-1063?
CVE-2018-1063 is a medium-severity path traversal vulnerability in Redhat Enterprise Linux, published on 2 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary file to a context with few restrictions. This only happens when the relabeling process is done, usually when taking SELinux state from disabled to enable (permissive or enforcing). The issue was found in policycoreutils 2.5-11.
Weakness: CWE-59
Which versions are affected by CVE-2018-1063?
It affects 2 products.
Linux distribution packages (39)
policycoreutils Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-devel Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-gui Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-newrole Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-python Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-restorecond Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils-sandbox Red Hat:enterprise_linux:7::client | All versions | 0:2.5-22.el7 |
policycoreutils Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-gui Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-newrole Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-python Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-restorecond Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils-sandbox Red Hat:enterprise_linux:7::computenode | All versions | 0:2.5-22.el7 |
policycoreutils Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-gui Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-newrole Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-python Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-restorecond Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils-sandbox Red Hat:enterprise_linux:7::server | All versions | 0:2.5-22.el7 |
policycoreutils Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-gui Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-newrole Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-python Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-restorecond Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils-sandbox Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5-22.el7 |
policycoreutils SUSE:Linux Enterprise Server 11 SP4 | All versions | 2.0.79-4.9.3.3 |
policycoreutils SUSE:Linux Enterprise Server 12 SP2 | All versions | 2.5-10.3.1 |
policycoreutils SUSE:Linux Enterprise Server 12 SP3 | All versions | 2.5-10.3.1 |
policycoreutils SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 2.5-10.3.1 |
policycoreutils SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 2.0.79-4.9.3.3 |
policycoreutils SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 2.5-10.3.1 |
policycoreutils SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 2.5-10.3.1 |
Products include Redhat Enterprise Linux, Selinux Project Selinux.
How do I fix CVE-2018-1063?
Apply the vendor's patch.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-1063 being exploited?
There is no known exploitation of CVE-2018-1063 in the wild and no public exploit code.
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Sources
Also known as DEBIAN-CVE-2018-1063, GHSA-p5j6-rvwf-qchg, MGASA-2021-0032, RHSA-2018:0913, SUSE-SU-2018:0926-1, SUSE-SU-2018:0927-1 and 1 more.