CVE-2020-10757 Privilege escalation in Kernel
High 7.8
Published
Updated
Check this codebase for CVE-2020-10757 and fix it if it is affected.
What it is: CVE-2020-10757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Jun 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-2020-10757 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-2020-10757/ (Markdown: https://insights.sbomify.com/CVE-2020-10757/index.md)
A local attacker with access to DAX-enabled storage can escalate privileges due to improper handling of DAX Huge Pages in mremap.
- 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-2020-10757?
CVE-2020-10757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.
Which versions are affected by CVE-2020-10757?
It affects 10 products.
Linux distribution packages (40)
bpftool Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
bpftool-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-abi-whitelists Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug-devel Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-devel Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-doc Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-headers Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-tools Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-tools-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-tools-libs Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-tools-libs-devel Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
perf Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
perf-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
python-perf Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
python-perf-debuginfo Red Hat:rhel_eus:7.7::computenode | All versions | 0:3.10.0-1062.33.1.el7 |
bpftool Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
bpftool-debuginfo Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-abi-whitelists Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-bootwrapper Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug-debuginfo Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debug-devel Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo-common-ppc64 Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo-common-ppc64le Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo-common-s390x Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-devel Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-doc Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-headers Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-kdump Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-kdump-debuginfo Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-kdump-devel Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
kernel-tools Red Hat:rhel_eus:7.7::server | All versions | 0:3.10.0-1062.33.1.el7 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup and 4 more.
How do I fix CVE-2020-10757?
Apply the vendor's patch.
Is CVE-2020-10757 being exploited?
There is no known exploitation of CVE-2020-10757 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-10757, GHSA-5r3p-jhq4-64gg, RHSA-2020:3598, SUSE-SU-2020:1764-1, SUSE-SU-2020:1781-1, UBUNTU-CVE-2020-10757.