CVE-2020-15187: Duplicate plugin entries in Helm
First published: Thu Sep 17 2020(Updated: )
### Impact During a security audit of Helm's code base, Helm maintainers identified a bug in which a Helm plugin can contain duplicates of the same entry, with the last one always used. If a plugin is compromised, this lowers the level of access that an attacker needs to modify a plugin's install hooks, causing a local execution attack. To perform this attack, an attacker must have write access to the git repository or plugin archive (.tgz) while being downloaded (which can occur during a MITM attack on a non-SSL connection). ### Patches This issue has been patched in Helm 2.16.11 and Helm 3.3.2. ### Workarounds Make sure to install plugins using a secure connection protocol like SSL.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/helm.sh/helm | <2.16.11 | 2.16.11 |
| go/helm.sh/helm/v3 | >=3.0.0<3.3.2 | 3.3.2 |
| Helm Helm | >=2.0.0<2.16.11 | |
| Helm Helm | >=3.0.0<3.3.2 |
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Reference Links
- https://github.com/helm/helm/security/advisories/GHSA-c52f-pq47-2r9j
- https://nvd.nist.gov/vuln/detail/CVE-2020-15187
- https://github.com/helm/helm/commit/6aab63765f99050b115f0aec3d6350c85e8da946
- https://github.com/helm/helm/commit/d9ef5ce8bad512e325390c0011be1244b8380e4b
- https://github.com/advisories/GHSA-c52f-pq47-2r9j (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-15187.
What is the impact of this vulnerability?
This vulnerability allows a compromised Helm plugin to have lowered access to modify a plugin's installation.
What is the severity of CVE-2020-15187?
The severity of CVE-2020-15187 is low.
Which software versions are affected by CVE-2020-15187?
The affected software versions are Helm 2.16.11 (exact remedy) and Helm 3.0.0 to 3.3.2 (inclusive exclusive).
How can I fix CVE-2020-15187?
To fix CVE-2020-15187, update Helm to version 2.16.11 (exact remedy) or version 3.3.2 (inclusive exclusive).
- collector/github-advisory-latest
- alias/GHSA-c52f-pq47-2r9j
- alias/CVE-2020-15187
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