Unsafe Deserialization in org.rundeck:rundeck-core (CVE-2021-39132)
Summary
Vulnerability in org.rundeck:rundeck-core (CVE-2021-39132). Successful exploitation can lead to full system takeover. Exploitable via admin. Mitigation: upgrade to 3.3.14 or later.
Original description
The description as published by the source.
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
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-2021-39132 has been found in org.rundeck:rundeck-core.
Attackers can target a specific entry point like admin over the network to misuse the product.
Successful exploitation can lead to full system takeover.
What to do: upgrade org.rundeck:rundeck-core to 3.3.14 or later.
If unsure, ask your IT team or search "org.rundeck:rundeck-core CVE-2021-39132" on the vendor's site.
CVE-2021-39132 (org.rundeck:rundeck-core) — CWE-502
Attack vector: remote (network-reachable) / no user interaction
Attack surface: admin / system / create / update
Patched: 3.3.14 — 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.
Unsafe deserialization (CWE-502) exists in org.rundeck:rundeck-core. Attackers reach the vulnerable code path via admin.
Check the vendor advisory for the affected versions of org.rundeck:rundeck-core. Attack surface: admin / system / create / update.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 3.3.14.
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. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで org.rundeck:rundeck-core を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade org.rundeck:rundeck-core to 3.3.14ステージング環境で 3.3.14 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。
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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 github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com