Vulnerability in github.com/cloudflare/cloudflared (CVE-2023-1314)
Summary
Vulnerability in github.com/cloudflare/cloudflared (CVE-2023-1314). Data can be tampered with by attackers. Mitigation: upgrade to 0.0.0-20230313153246-f686da832f85 or later.
Original description
The description as published by the source.
Impact
A vulnerability has been discovered in cloudflared's installer (<= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory.
An attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer's repair functionality to delete the target file during the repair process.
Exploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.
The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.
Patches
A new installer was released as part of version 2023.3.1, corresponding to pseudoversion 0.0.0-20230313153246-f686da832f85 on pkg.go.dev. Users are encouraged to remove old installers from their systems.
References
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-2023-1314 has been found in github.com/cloudflare/cloudflared.
Data can be tampered with by attackers.
What to do: upgrade github.com/cloudflare/cloudflared to 0.0.0-20230313153246-f686da832f85 or later.
If unsure, ask your IT team or search "github.com/cloudflare/cloudflared CVE-2023-1314" on the vendor's site.
CVE-2023-1314 (github.com/cloudflare/cloudflared) — CWE-59
Attack vector: local / no user interaction
Patched: 0.0.0-20230313153246-f686da832f85 — 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.
A vulnerability (CWE-59) exists in github.com/cloudflare/cloudflared.
Check the vendor advisory for the affected versions of github.com/cloudflare/cloudflared.
Severity: ?. Data can be tampered with by attackers.
Update to 0.0.0-20230313153246-f686da832f85.
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 'github.com/cloudflare/cloudflared' . 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/cloudflare/cloudflared' . | 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/cloudflare/cloudflared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 github.com/cloudflare/cloudflared to 0.0.0-20230313153246-f686da832f85ステージング環境で 0.0.0-20230313153246-f686da832f85 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
- web github.com
- web github.com
- web github.com