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UBUNTU-CVE-2020-27843
Vulnerability in openjpeg (UBUNTU-CVE-2020-27843)
Summary
vulnerability in openjpeg (UBUNTU-CVE-2020-27843). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `9.26~dfsg+0-0ubuntu0.16.04.14` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2020-27843** has been found in openjpeg.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade openjpeg to **9.26~dfsg+0-0ubuntu0.16.04.14** or later.
If unsure, ask your IT team or search "openjpeg UBUNTU-CVE-2020-27843" on the vendor's site.
UBUNTU-CVE-2020-27843 (openjpeg) —
Attack vector: local / unauthenticated
Patched: `9.26~dfsg+0-0ubuntu0.16.04.14` — 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.
❓ What is the problem
**A vulnerability** (unclassified) exists in openjpeg.
📍 Affected scope
openjpeg — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **9.26~dfsg+0-0ubuntu0.16.04.14**.
🛡️ 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 'openjpeg' .` 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 'openjpeg' . | 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 `openjpeg` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade openjpeg to 9.26~dfsg+0-0ubuntu0.16.04.14ステージング環境で 9.26~dfsg+0-0ubuntu0.16.04.14 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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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。
Affected packages
Ubuntu:14.04:LTS
openjpeg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
ghostscript
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.26~dfsg+0-0ubuntu0.16.04.14"}]}]
Ubuntu:Pro:16.04:LTS
openjpeg2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2-1.1+deb9u6ubuntu0.1~esm3"}]}]
Ubuntu:16.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
insighttoolkit4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
openjpeg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
ghostscript
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.26~dfsg+0-0ubuntu0.18.04.14"}]}]
Ubuntu:18.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
insighttoolkit4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS
openjpeg2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
openjpeg2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-1ubuntu4.20.04.1"}]}]
Ubuntu:20.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
insighttoolkit4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
insighttoolkit4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
openjpeg2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.1-1ubuntu5"}]}]
Ubuntu:22.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
blender
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:22.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:22.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:24.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:24.04:LTS
texmaker
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:26.04:LTS
qtwebengine-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]