Vulnerability in get-func-name (CVE-2023-43646)
Summary
Vulnerability in get-func-name (CVE-2023-43646). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 2.0.1 or later.
Original description
The description as published by the source.
The current regex implementation for parsing values in the module is susceptible to excessive backtracking, leading to potential DoS attacks. The regex implementation in question is as follows:
const functionNameMatch = /\s*function(?:\s|\s*\/\*[^(?:*/)]+\*\/\s*)*([^\s(/]+)/;
This vulnerability can be exploited when there is an imbalance in parentheses, which results in excessive backtracking and subsequently increases the CPU load and processing time significantly. This vulnerability can be triggered using the following input:
'\t'.repeat(54773) + '\t/function/i'
Here is a simple PoC code to demonstrate the issue:
const protocolre = /\sfunction(?:\s|\s/*[^(?:*\/)]+*/\s*)*([^\(\/]+)/;
const startTime = Date.now();
const maliciousInput = '\t'.repeat(54773) + '\t/function/i'
protocolre.test(maliciousInput);
const endTime = Date.now();
console.log("process time: ", endTime - startTime, "ms");
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-2023-43646 has been found in get-func-name.
Risk of unauthorized operations or information disclosure.
What to do: upgrade get-func-name to 2.0.1 or later.
If unsure, ask your IT team or search "get-func-name CVE-2023-43646" on the vendor's site.
CVE-2023-43646 (get-func-name) — CWE-1333
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2.0.1 — 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-1333) exists in get-func-name.
Check the vendor advisory for the affected versions of get-func-name.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 2.0.1.
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 'get-func-name' . 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 'get-func-name' . | 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
get-func-name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 get-func-name to 2.0.1ステージング環境で 2.0.1 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
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-43646 node-get-func-name
- Ubuntu UBUNTU-CVE-2023-43646 node-get-func-name
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com