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CLSA-2021-1635459227
Vulnerability in libmysqlclient-dev (CLSA-2021-1635459227)
Summary
vulnerability in libmysqlclient-dev (CLSA-2021-1635459227). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `5.7.35-0ubuntu0.16.04.1.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CLSA-2021-1635459227** has been found in libmysqlclient-dev.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade libmysqlclient-dev to **5.7.35-0ubuntu0.16.04.1.1** or later.
If unsure, ask your IT team or search "libmysqlclient-dev CLSA-2021-1635459227" on the vendor's site.
CLSA-2021-1635459227 (libmysqlclient-dev) —
Patched: `5.7.35-0ubuntu0.16.04.1.1` — 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 libmysqlclient-dev.
📍 Affected scope
libmysqlclient-dev — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **5.7.35-0ubuntu0.16.04.1.1**.
🛡️ 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 'libmysqlclient-dev' .` 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 'libmysqlclient-dev' . | 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 `libmysqlclient-dev` 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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6Apply patch patch
Upgrade libmysqlclient-dev to 5.7.35-0ubuntu0.16.04.1.1ステージング環境で 5.7.35-0ubuntu0.16.04.1.1 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
TuxCare:Ubuntu:16.04
libmysqlclient-dev
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
libmysqlclient20
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
libmysqld-dev
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-client
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-client-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-client-core-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-common
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-server-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-server-core-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-source-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-testsuite
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]
TuxCare:Ubuntu:16.04
mysql-testsuite-5.7
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.35-0ubuntu0.16.04.1.1"}]}]