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CVE-2020-12400
medium
CVSS 4.7
Information Disclosure in mozilla (CVE-2020-12400)
Summary
vulnerability in mozilla (CVE-2020-12400). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2020-12400** has been found in mozilla.
Confidential information can be exposed externally. CVSS score: 4.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "mozilla CVE-2020-12400" on the vendor's site.
CVE-2020-12400 (mozilla) — CWE-200 / CVSS v3 4.7
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
**information disclosure** (CWE-200) exists in mozilla.
📍 Affected scope
mozilla — .
🔥 Severity
Severity: Medium (CVSS 4.7/10). Confidential information can be exposed externally
🔧 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 'mozilla' .` 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 'mozilla' . | 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 `mozilla` を grep し、稼働しているサービス・バージョンを把握する。
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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
- patch af854a3a-2127-422b-91ae-364da2661108
- patch af854a3a-2127-422b-91ae-364da2661108
- web https://bugzilla.mozilla.org/show_bug.cgi?id=1623116
- web https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
- web https://nvd.nist.gov/vuln/detail/CVE-2020-12400
- web https://www.mozilla.org/security/advisories/mfsa2020-36
- web https://www.mozilla.org/security/advisories/mfsa2020-39
- web https://github.com/advisories/GHSA-38vr-4p57-8h9g