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UBUNTU-CVE-2020-36846
Vulnerability in libio-compress-brotli-perl (UBUNTU-CVE-2020-36846)
Summary
vulnerability in libio-compress-brotli-perl (UBUNTU-CVE-2020-36846). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2020-36846** has been found in libio-compress-brotli-perl.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "libio-compress-brotli-perl UBUNTU-CVE-2020-36846" on the vendor's site.
UBUNTU-CVE-2020-36846 (libio-compress-brotli-perl) —
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.
❓ What is the problem
**A vulnerability** (unclassified) exists in libio-compress-brotli-perl.
📍 Affected scope
libio-compress-brotli-perl — .
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 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 'libio-compress-brotli-perl' .` 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 'libio-compress-brotli-perl' . | 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 `libio-compress-brotli-perl` 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。
Affected packages
Ubuntu:24.04:LTS
libio-compress-brotli-perl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
libio-compress-brotli-perl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
libio-compress-brotli-perl
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report https://ubuntu.com/security/CVE-2020-36846
- report https://www.cve.org/CVERecord?id=CVE-2020-36846
- report https://lists.security.metacpan.org/cve-announce/msg/30005245/
- report https://github.com/google/brotli/pull/826
- report https://github.com/timlegge/perl-IO-Compress-Brotli/blob/8b44c83b23bb4658179e1494af4b725a1bc476bc/Changes#L52
- report https://github.com/advisories/GHSA-5v8v-66v8-mwm7
- report https://github.com/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6
- report https://nvd.nist.gov/vuln/detail/CVE-2020-8927