Vulnerability in github.com/elves/elvish (CVE-2021-41088)
Summary
Vulnerability in github.com/elves/elvish (CVE-2021-41088). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 0.14.0 or later.
Original description
The description as published by the source.
Impact
Elvish's backend for the experimental web UI (started by elvish -web) hosts an endpoint that allows executing the code sent from the web UI.
The backend does not check the origin of requests correctly. As a result, if the user has the web UI backend open and visits a compromised or malicious website, the website can send arbitrary code to the endpoint in localhost.
Patches
All Elvish releases since 0.14.0 no longer include the experimental web UI, although it is still possible for the user to build a version from source that includes it.
The issue can be patched for previous versions by removing the web UI (found in web, pkg/web or pkg/prog/web, depending on the exact version).
Workarounds
Do not use the experimental web UI.
For more information
If you have any questions or comments about this advisory, please email xiaqqaix@gmail.com.
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-2021-41088 has been found in github.com/elves/elvish.
Successful exploitation can lead to full system takeover.
What to do: upgrade github.com/elves/elvish to 0.14.0 or later.
If unsure, ask your IT team or search "github.com/elves/elvish CVE-2021-41088" on the vendor's site.
CVE-2021-41088 (github.com/elves/elvish) — CWE-346
Attack vector: remote (network-reachable)
Patched: 0.14.0 — apply immediately
Workaround: Do not use the experimental web UI.
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.
A vulnerability (CWE-346) exists in github.com/elves/elvish.
Check the vendor advisory for the affected versions of github.com/elves/elvish.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 0.14.0.
Workaround: Do not use the experimental web UI.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/elves/elvish' . 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 'github.com/elves/elvish' . | 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
github.com/elves/elvishを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Do not use the experimental web UI.パッチが適用されるまでの応急処置として、Do not use the experimental web UI. を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade github.com/elves/elvish to 0.14.0ステージング環境で 0.14.0 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。
-
4Post-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
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2021-41088 elvish
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com