OS Command Injection in binderhub (CVE-2021-39159)
Summary
OS command injection in binderhub (CVE-2021-39159). Successful exploitation can lead to full system takeover. Exploitable via BinderHub.repo_providers. Mitigation: upgrade to 0.2.0 or later.
Original description
The description as published by the source.
BinderHub is a kubernetes-based cloud service that allows users to share reproducible interactive computing environments from code repositories. In affected versions a remote code execution vulnerability has been identified in BinderHub, where providing BinderHub with maliciously crafted input could execute code in the BinderHub context, with the potential to egress credentials of the BinderHub deployment, including JupyterHub API tokens, kubernetes service accounts, and docker registry credentials. This may provide the ability to manipulate images and other user created pods in the deployment, with the potential to escalate to the host depending on the underlying kubernetes configuration. Users are advised to update to version 0.2.0-n653. If users are unable to update they may disable the git repo provider by specifying the BinderHub.repo_providers as a workaround.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2021-39159 has been found in binderhub.
Attackers can target a specific entry point like BinderHub.repo_providers over the network to misuse the product.
Successful exploitation can lead to full system takeover.
What to do: upgrade binderhub to 0.2.0 or later.
If unsure, ask your IT team or search "binderhub CVE-2021-39159" on the vendor's site.
CVE-2021-39159 (binderhub) — CWE-78
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: BinderHub.repo_providers
Patched: 0.2.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
OS command injection (CWE-78) exists in binderhub. Attackers reach the vulnerable code path via BinderHub.repo_providers without authentication.
Check the vendor advisory for the affected versions of binderhub. Attack surface: BinderHub.repo_providers.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 0.2.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'binderhub' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'binderhub' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
binderhubを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade binderhub to 0.2.0ステージング環境で 0.2.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- patch github.com
- patch github.com
- web github.com
- web github.com