CVE-2020-8597 Memory corruption in n/a
Critical 9.8
Published
Updated
Check this codebase for CVE-2020-8597 and fix it if it is affected.
What it is: CVE-2020-8597 is a critical memory corruption vulnerability in Canonical Ubuntu Linux, published on 3 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-8597 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-2020-8597/ (Markdown: https://insights.sbomify.com/CVE-2020-8597/index.md)
A buffer overflow in the PPP daemon's EAP handling allows remote attackers to execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-8597?
CVE-2020-8597 is a critical memory corruption vulnerability in Canonical Ubuntu Linux, published on 3 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions.
Weakness: CWE-120
Which versions are affected by CVE-2020-8597?
It affects 4 products.
Linux distribution packages (40)
ppp AlmaLinux:8 | All versions | 2.4.7-26.el8_1 |
ppp-devel AlmaLinux:8 | All versions | 2.4.7-26.el8_1 |
ppp Red Hat:enterprise_linux:6::client | All versions | 0:2.4.5-11.el6_10 |
ppp-debuginfo Red Hat:enterprise_linux:6::client | All versions | 0:2.4.5-11.el6_10 |
ppp-devel Red Hat:enterprise_linux:6::client | All versions | 0:2.4.5-11.el6_10 |
ppp Red Hat:enterprise_linux:6::computenode | All versions | 0:2.4.5-11.el6_10 |
ppp-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 0:2.4.5-11.el6_10 |
ppp-devel Red Hat:enterprise_linux:6::computenode | All versions | 0:2.4.5-11.el6_10 |
ppp Red Hat:enterprise_linux:6::server | All versions | 0:2.4.5-11.el6_10 |
ppp-debuginfo Red Hat:enterprise_linux:6::server | All versions | 0:2.4.5-11.el6_10 |
ppp-devel Red Hat:enterprise_linux:6::server | All versions | 0:2.4.5-11.el6_10 |
ppp Red Hat:enterprise_linux:6::workstation | All versions | 0:2.4.5-11.el6_10 |
ppp-debuginfo Red Hat:enterprise_linux:6::workstation | All versions | 0:2.4.5-11.el6_10 |
ppp-devel Red Hat:enterprise_linux:6::workstation | All versions | 0:2.4.5-11.el6_10 |
ppp Red Hat:enterprise_linux:7::client | All versions | 0:2.4.5-34.el7_7 |
ppp-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:2.4.5-34.el7_7 |
ppp-devel Red Hat:enterprise_linux:7::client | All versions | 0:2.4.5-34.el7_7 |
ppp Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.5-34.el7_7 |
ppp-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.5-34.el7_7 |
ppp-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.5-34.el7_7 |
ppp Red Hat:enterprise_linux:7::server | All versions | 0:2.4.5-34.el7_7 |
ppp-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.4.5-34.el7_7 |
ppp-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.4.5-34.el7_7 |
ppp Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.5-34.el7_7 |
ppp-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.5-34.el7_7 |
ppp-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.5-34.el7_7 |
network-scripts-ppp Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.7-26.el8_1 |
ppp-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.7-26.el8_1 |
ppp-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:2.4.7-26.el8_1 |
ppp Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.7-26.el8_1 |
ppp-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.7-26.el8_1 |
ppp-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:2.4.7-26.el8_1 |
ppp Red Hat:enterprise_linux:8::crb | All versions | 0:2.4.7-26.el8_1 |
ppp-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:2.4.7-26.el8_1 |
ppp-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:2.4.7-26.el8_1 |
ppp-devel Red Hat:enterprise_linux:8::crb | All versions | 0:2.4.7-26.el8_1 |
ppp Red Hat:rhel_e4s:8.0::baseos | All versions | 0:2.4.7-26.el8_0 |
ppp-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:2.4.7-26.el8_0 |
ppp-debugsource Red Hat:rhel_e4s:8.0::baseos | All versions | 0:2.4.7-26.el8_0 |
ppp Rocky Linux:8 | All versions | 0:2.4.7-26.el8_1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Point-to-Point Protocol Project Point-to-Point Protocol, Wago Pfc Firmware.
How do I fix CVE-2020-8597?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-8597 being exploited?
There is no known exploitation of CVE-2020-8597 in the wild and no public exploit code.
Public exploit code: 5 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2020-8597, ALSA-2020:0633, AZL-45009, DEBIAN-CVE-2020-8597, DLA-2097-1, DSA-4632-1 and 15 more.