CVE-2017-2636 Race condition in n/a
High 7.0
Published
Updated
Check this codebase for CVE-2017-2636 and fix it if it is affected.
What it is: CVE-2017-2636 is a high-severity vulnerability in Debian Debian Linux, published on 7 Mar 2017. 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-2017-2636 in the wild and no public exploit code.
Affected product: Debian Debian 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-2017-2636/ (Markdown: https://insights.sbomify.com/CVE-2017-2636/index.md)
Local attackers can exploit a race condition in the HDLC line discipline to gain privileges or cause a denial of service via double free.
- 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-2017-2636?
CVE-2017-2636 is a high-severity vulnerability in Debian Debian Linux, published on 7 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.
Which versions are affected by CVE-2017-2636?
It affects 2 products.
Linux distribution packages (40)
kernel Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-debug Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-debug-debuginfo Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-debug-devel Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-debuginfo Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-devel Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-doc Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-firmware Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel-headers Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
perf Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
perf-debuginfo Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
python-perf Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
python-perf-debuginfo Red Hat:rhel_aus:6.4::server | All versions | 0:2.6.32-358.78.1.el6 |
kernel Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-abi-whitelists Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-debug Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-debug-debuginfo Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-debug-devel Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-debuginfo Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-devel Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-doc Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-firmware Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel-headers Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
perf Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
perf-debuginfo Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
python-perf Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
python-perf-debuginfo Red Hat:rhel_aus:6.5::server | All versions | 0:2.6.32-431.80.1.el6 |
kernel Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-abi-whitelists Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debug Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debug-debuginfo Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debug-devel Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debuginfo Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debuginfo-common-i686 Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-devel Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-doc Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
kernel-firmware Red Hat:rhel_eus:6.7::computenode | All versions | 0:2.6.32-573.42.1.el6 |
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2017-2636?
Apply the vendor's patch.
Is CVE-2017-2636 being exploited?
There is no known exploitation of CVE-2017-2636 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-2636, GHSA-gxfh-c6q2-wcm7, RHSA-2017:0986, RHSA-2017:1125, RHSA-2017:1126, RHSA-2017:1232 and 9 more.