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UBUNTU-CVE-2016-1856
Vulnerability in webkit2gtk (UBUNTU-CVE-2016-1856)
Summary
vulnerability in webkit2gtk (UBUNTU-CVE-2016-1856). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `2.12.5-0ubuntu0.16.04.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2016-1856** has been found in webkit2gtk.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: upgrade webkit2gtk to **2.12.5-0ubuntu0.16.04.1** or later.
If unsure, ask your IT team or search "webkit2gtk UBUNTU-CVE-2016-1856" on the vendor's site.
UBUNTU-CVE-2016-1856 (webkit2gtk) —
Attack vector: remote (network-reachable) / unauthenticated
Patched: `2.12.5-0ubuntu0.16.04.1` — 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.
❓ What is the problem
**A vulnerability** (unclassified) exists in webkit2gtk.
📍 Affected scope
webkit2gtk — .
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **2.12.5-0ubuntu0.16.04.1**.
🛡️ 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 'webkit2gtk' .` 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 'webkit2gtk' . | 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 `webkit2gtk` 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 webkit2gtk to 2.12.5-0ubuntu0.16.04.1ステージング環境で 2.12.5-0ubuntu0.16.04.1 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:16.04:LTS
webkit2gtk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-0ubuntu0.16.04.1"}]}]
Ubuntu:16.04:LTS
qtwebkit-source
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
webkitgtk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:16.04:LTS
qtwebkit-opensource-src
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory https://ubuntu.com/security/notices/USN-3079-1
- report https://ubuntu.com/security/CVE-2016-1856
- report https://support.apple.com/HT206564
- report https://support.apple.com/HT206565
- report https://support.apple.com/HT206568
- report http://lists.apple.com/archives/security-announce/2016/May/msg00001.html
- report http://lists.apple.com/archives/security-announce/2016/May/msg00002.html
- report http://lists.apple.com/archives/security-announce/2016/May/msg00005.html
- report https://webkitgtk.org/security/WSA-2016-0004.html
- report https://www.cve.org/CVERecord?id=CVE-2016-1856