SSRF (Server-Side Request Forgery) in blackbox_exporter (CVE-2023-26735)
Summary
SSRF in blackbox_exporter (CVE-2023-26735). Confidential information can be exposed externally.
Original description
The description as published by the source.
Withdrawn Advisory
This advisory has been withdrawn because it was determined to be a configuration issue rather than a vulnerability. This link is maintained to preserve external references. For more information, see the conversation here.
Original Advisory
blackbox_exporter v0.23.0 was discovered to contain an access control issue in its probe interface. This vulnerability allows attackers to detect intranet ports and services, as well as download resources.
Source: NIST National Vulnerability Database NVD GitHub Advisory
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-2023-26735 has been found in blackbox_exporter.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "blackbox_exporter CVE-2023-26735" on the vendor's site.
CVE-2023-26735 (blackbox_exporter) — CWE-918 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
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.
SSRF (CWE-918) exists in blackbox_exporter.
Check the vendor advisory for the affected versions of blackbox_exporter.
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally.
Update to the patched release per vendor advisory.
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 'blackbox_exporter' . 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 'blackbox_exporter' . | 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
blackbox_exporterを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-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
- Debian DEBIAN-CVE-2023-26735 prometheus-blackbox-exporter
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web blackboxexporter.com
- web prometheus.com