Buffer Overflow in Haxx (CVE-2017-9502)
Summary
Vulnerability in Haxx (CVE-2017-9502). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
When libcurl is given either
- a file: URL that does not use two slashes following the colon, or
- is told that file is the default scheme to use for URLs without scheme
... and the given path starts with a drive letter and libcurl is built for
Windows or DOS, then libcurl would copy the path with a wrong offset, so that
the end of the given path would write beyond the malloc buffer. Up to seven
bytes too much.
Source: NIST National Vulnerability Database NVD
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-2017-9502 has been found in Haxx.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Haxx CVE-2017-9502" on the vendor's site.
CVE-2017-9502 (Haxx) — CWE-119 / CVSS v3 5.3
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-119) exists in Haxx.
Check the vendor advisory for the affected versions of Haxx.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
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。
References
- advisory openwall.com
- advisory securityfocus.com
- patch curl.haxx.se
- web securitytracker.com