CVE-2020-10696 Path Traversal in Buildah
High 8.8
Published
Updated
Check this codebase for CVE-2020-10696 and fix it if it is affected.
What it is: CVE-2020-10696 is a high-severity path traversal vulnerability in Redhat Enterprise Linux, published on 31 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-10696 in the wild and no public exploit code.
Affected packages and fixed versions:
- github.com/containers/buildah (Go): affected all versions; fixed in 1.14.4
- github.com/containers/buildah (Go): affected all versions; fixed in 1.14.4
- github.com/containers/buildah (Go): affected all versions; fixed in 1.14.4
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-2020-10696/ (Markdown: https://insights.sbomify.com/CVE-2020-10696/index.md)
Attackers can write arbitrary files to a user's system by tricking them into building a malicious container image with Buildah.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-10696?
CVE-2020-10696 is a high-severity path traversal vulnerability in Redhat Enterprise Linux, published on 31 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A path traversal flaw was found in Buildah in versions before 1.14.5. This flaw allows an attacker to trick a user into building a malicious container image hosted on an HTTP(s) server and then write files to the user's system anywhere that the user has permissions.
Weakness: CWE-22
Which versions are affected by CVE-2020-10696?
3 open source packages ship an affected version, including github.com/containers/buildah. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
github.com/containers/buildah Go | All versions | 1.14.4 |
github.com/containers/buildah Go | All versions | 1.14.4 |
github.com/containers/buildah Go | All versions | 1.14.4 |
Linux distribution packages (37)
cockpit-podman AlmaLinux:8 | All versions | 11-1.module_el8.5.0+108+00865455 |
cockpit-podman AlmaLinux:8 | All versions | 11-1.module_el8.5.0+2635+e4386a39 |
container-selinux AlmaLinux:8 | All versions | 2:2.124.0-1.gitf958d0c.module_el8.3.0+2044+12421f43 |
containernetworking-plugins AlmaLinux:8 | All versions | 0.8.3-4.module_el8.5.0+108+00865455 |
containernetworking-plugins AlmaLinux:8 | All versions | 0.8.3-4.module_el8.5.0+2635+e4386a39 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
crit AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.4.0+2496+12421f43 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
criu AlmaLinux:8 | All versions | 3.12-9.module_el8.5.0+119+9a9ec082 |
fuse-overlayfs AlmaLinux:8 | All versions | 0.3-5.module_el8.3.0+2044+12421f43 |
fuse-overlayfs AlmaLinux:8 | All versions | 0.3-5.module_el8.4.0+2496+12421f43 |
fuse-overlayfs AlmaLinux:8 | All versions | 0.3-5.module_el8.5.0+119+9a9ec082 |
oci-systemd-hook AlmaLinux:8 | All versions | 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43 |
oci-systemd-hook AlmaLinux:8 | All versions | 1:0.1.15-2.git2d0b8a3.module_el8.4.0+2496+12421f43 |
oci-systemd-hook AlmaLinux:8 | All versions | 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082 |
oci-umount AlmaLinux:8 | All versions | 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43 |
oci-umount AlmaLinux:8 | All versions | 2:2.3.4-2.git87f9237.module_el8.4.0+2496+12421f43 |
oci-umount AlmaLinux:8 | All versions | 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082 |
python-podman-api AlmaLinux:8 | All versions | 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455 |
python-podman-api AlmaLinux:8 | All versions | 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455 |
python-podman-api AlmaLinux:8 | All versions | 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39 |
python-podman-api AlmaLinux:8 | All versions | 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39 |
python3-criu AlmaLinux:8 | All versions | 3.12-9.module_el8.3.0+2044+12421f43 |
Products include Buildah Project Buildah, Redhat Enterprise Linux, Redhat Openshift Container Platform.
How do I fix CVE-2020-10696?
Upgrade github.com/containers/buildah to 1.14.4 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-10696 being exploited?
There is no known exploitation of CVE-2020-10696 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2024-9675 Buildah: buildah allows arbitrary directory mount
- CVE-2022-2990 Buildah's incorrect handling of the supplementary groups may lead to data disclosure, modification
- CVE-2022-27651 Non-empty default inheritable capabilities for linux container in Buildah
- CVE-2019-10214 containers/image library Insufficiently Protects Credentials
- CVE-2021-3602 Buildah processes using chroot isolation may leak environment values to intermediate processes
Sources
Also known as ALSA-2020:1926, ALSA-2020:1931, ALSA-2020:1932, CLEANSTART-2024-DG53593, DEBIAN-CVE-2020-10696, GHSA-fx8w-mjvm-hvpc and 10 more.