Information Disclosure in Haxx (CVE-2017-1000099)
Summary
Vulnerability in Haxx (CVE-2017-1000099). Confidential information can be exposed externally.
Original description
The description as published by the source.
When asking to get a file from a file:// URL, libcurl provides a feature that
outputs meta-data about the file using HTTP-like headers.
The code doing this would send the wrong buffer to the user (stdout or the
application's provide callback), which could lead to other private data from
the heap to get inadvertently displayed.
The wrong buffer was an uninitialized memory area allocated on the heap and if
it turned out to not contain any zero byte, it would continue and display the
data following that buffer in memory.
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-2017-1000099 has been found in Haxx.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Haxx CVE-2017-1000099" on the vendor's site.
CVE-2017-1000099 (Haxx) — CWE-200 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated
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.
Information disclosure (CWE-200) exists in Haxx.
Check the vendor advisory for the affected versions of Haxx.
Severity: Medium (CVSS 6.5/10). 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 '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-2017-1000099 curl Fixed in: 7.55.0-r0
References
- advisory securityfocus.com
- advisory securitytracker.com
- patch curl.haxx.se
- patch security.gentoo.org
- patch nvd@nist.gov