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CVE-2025-21678
medium
CVSS 5.5
Vulnerability in c (CVE-2025-21678)
Summary
vulnerability in c (CVE-2025-21678). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-21678** has been found in c.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "c CVE-2025-21678" on the vendor's site.
CVE-2025-21678 (c) — CVSS v3 5.5
Attack vector: local / 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.
❓ What is the problem
**A vulnerability** (unclassified) exists in c.
📍 Affected scope
c — .
🔥 Severity
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'c' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'c' . | 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 `c` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- web https://git.kernel.org/stable/c/036f8d814a2cd11ee8ef62b8f3e7ce5dec0ee4f3
- web https://git.kernel.org/stable/c/5f1678346109ff3a6d229d33437fcba3cce9209d
- web https://git.kernel.org/stable/c/86f73d4ab2f27deeff22ba9336ad103d94f12ac7
- web https://git.kernel.org/stable/c/bb11f992f5a475bc68ef959f17a55306f0328495
- web https://git.kernel.org/stable/c/c986380c1d5274c4d5e935addc807d6791cc23eb
- web https://git.kernel.org/stable/c/eb28fd76c0a08a47b470677c6cef9dd1c60e92d1
- web https://git.kernel.org/stable/c/efec287cbac92ac6ee8312a89221854760e13b34
- web https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- web https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- web https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- web https://cert-portal.siemens.com/productcert/html/ssa-503939.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-21678
- web https://github.com/advisories/GHSA-52qf-338q-xphv