# CVE-2020-10749: containernetworking/plugins vulnerable to MitM attacks > Malicious containers can perform man-in-the-middle attacks by sending rogue IPv6 router advertisements to redirect traffic. - **Severity:** Medium 6.0 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 3 Jun 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-10749, GHSA-fx6x-h9g4-56f8, GO-2023-1915, RHSA-2020:2403, RHSA-2020:2443, RHSA-2020:2592, RHSA-2020:2684, SUSE-SU-2020:1957-1, UBUNTU-CVE-2020-10749, openSUSE-SU-2020:1049-1, openSUSE-SU-2020:1050-1, openSUSE-SU-2024:10689-1 ## What is CVE-2020-10749? CVE-2020-10749 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description A vulnerability was found in all versions of containernetworking/plugins before version 0.8.6, that allows malicious containers in Kubernetes clusters to perform man-in-the-middle (MitM) attacks. A malicious container can exploit this flaw by sending rogue IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container. Weakness: CWE-300 (Channel Accessible by Non-Endpoint) ## Which versions are affected by CVE-2020-10749? 3 open source packages ship an affected version, including github.com/containernetworking/plugins. It affects 4 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `github.com/containernetworking/plugins` | Go | All versions | 0.8.6 | | `github.com/containernetworking/plugins` | Go | All versions | 0.8.6 | | `github.com/containernetworking/plugins` | Go | All versions | 0.8.6 | | `containernetworking-plugins` | Red Hat:openshift:4.2::el7 | All versions | 0:0.8.6-1.rhaos4.2.el7 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.2::el7 | All versions | 0:0.8.6-1.rhaos4.2.el7 | | `containernetworking-plugins` | Red Hat:openshift:4.2::el8 | All versions | 0:0.8.6-1.rhaos4.2.el8 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.2::el8 | All versions | 0:0.8.6-1.rhaos4.2.el8 | | `containernetworking-plugins-debugsource` | Red Hat:openshift:4.2::el8 | All versions | 0:0.8.6-1.rhaos4.2.el8 | | `containernetworking-plugins` | Red Hat:openshift:4.3::el7 | All versions | 0:0.8.6-1.rhaos4.3.el7 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.3::el7 | All versions | 0:0.8.6-1.rhaos4.3.el7 | | `containernetworking-plugins` | Red Hat:openshift:4.3::el8 | All versions | 0:0.8.6-1.rhaos4.3.el8 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.3::el8 | All versions | 0:0.8.6-1.rhaos4.3.el8 | | `containernetworking-plugins-debugsource` | Red Hat:openshift:4.3::el8 | All versions | 0:0.8.6-1.rhaos4.3.el8 | | `containernetworking-plugins` | Red Hat:openshift:4.4::el7 | All versions | 0:0.8.6-1.rhaos4.4.el7 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.4::el7 | All versions | 0:0.8.6-1.rhaos4.4.el7 | | `containernetworking-plugins` | Red Hat:openshift:4.4::el8 | All versions | 0:0.8.6-1.rhaos4.4.el8 | | `containernetworking-plugins-debuginfo` | Red Hat:openshift:4.4::el8 | All versions | 0:0.8.6-1.rhaos4.4.el8 | | `containernetworking-plugins-debugsource` | Red Hat:openshift:4.4::el8 | All versions | 0:0.8.6-1.rhaos4.4.el8 | | `containernetworking-plugins` | Red Hat:rhel_extras_other:7 | All versions | 0:0.8.3-3.el7_8 | | `containernetworking-plugins-debuginfo` | Red Hat:rhel_extras_other:7 | All versions | 0:0.8.3-3.el7_8 | | `cni-plugins` | SUSE:Linux Enterprise Module for Containers 15 SP1 | All versions | 0.8.6-3.6.1 | | `cni-plugins` | SUSE:Linux Enterprise Module for Containers 15 SP2 | All versions | 0.8.6-3.6.1 | | `cni-plugins` | SUSE:Linux Enterprise Module for Public Cloud 15 SP1 | All versions | 0.8.6-3.6.1 | | `cni-plugins` | openSUSE:Leap 15.1 | All versions | 0.8.6-lp151.2.6.1 | | `cni-plugins` | openSUSE:Leap 15.2 | All versions | 0.8.6-lp152.2.4.1 | | `cni-plugins` | openSUSE:Tumbleweed | All versions | 0.9.1-1.3 | Products: Fedoraproject Fedora, Linuxfoundation Cni Network Plugins, Redhat Enterprise Linux, Redhat Openshift Container Platform. ## How do I fix CVE-2020-10749? Upgrade github.com/containernetworking/plugins to 0.8.6 or later. ## Is CVE-2020-10749 being exploited? There is no known exploitation of CVE-2020-10749 in the wild and no public exploit code. Public exploit code: - CVE-2020-10749 PoC (Kubernetes MitM attacks via IPv6 rogue router advertisements) (github_poc): https://github.com/knqyf263/CVE-2020-10749 ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-10749 and fix it if it is affected. What it is: CVE-2020-10749 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-10749 in the wild and no public exploit code. Affected packages and fixed versions: - github.com/containernetworking/plugins (Go): affected all versions; fixed in 0.8.6 - github.com/containernetworking/plugins (Go): affected all versions; fixed in 0.8.6 - github.com/containernetworking/plugins (Go): affected all versions; fixed in 0.8.6 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-2020-10749/ (Markdown: https://insights.sbomify.com/CVE-2020-10749/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10749 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10749 - OSV: https://osv.dev/vulnerability/CVE-2020-10749 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-10749/ Summaries are generated and may contain mistakes; the official description above is the record.