Vulnerability in Haxx (CVE-2023-23914)
Summary
Vulnerability in Haxx (CVE-2023-23914). Confidential information can be exposed externally.
Original description
The description as published by the source.
curl's HSTS functionality fail when multiple URLs are requested serially.
Using its HSTS support, curl can be instructed to use HTTPS instead of using
an insecure clear-text HTTP step even when HTTP is provided in the URL. This
HSTS mechanism would however surprisingly be ignored by subsequent transfers
when done on the same command line because the state would not be properly
carried on.
Reproducible like this:
curl --hsts "" https://curl.se http://curl.se
The first URL returns HSTS information that the second URL fails to take
advantage of.
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-2023-23914 has been found in Haxx.
Confidential information can be exposed externally. CVSS score: 9.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Haxx CVE-2023-23914" on the vendor's site.
CVE-2023-23914 (Haxx) — CWE-319 / CVSS v3 9.1
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.
A vulnerability (CWE-319) exists in Haxx.
Check the vendor advisory for the affected versions of Haxx.
Severity: Critical (CVSS 9.1/10). 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 'Haxx' . 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 'Haxx' . | 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
Haxx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。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2023-23914 curl Fixed in: 7.79.1-r5
- Debian DEBIAN-CVE-2023-23914 curl
References
- advisory security.gentoo.org
- advisory security.netapp.com
- exploit hackerone.com
- web cert-portal.siemens.com