Vulnerability in python2.7 (UBUNTU-CVE-2021-4189)

Summary

vulnerability in python2.7 (UBUNTU-CVE-2021-4189). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `2.7.6-8ubuntu0.6+esm12` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **UBUNTU-CVE-2021-4189** has been found in python2.7. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade python2.7 to **2.7.6-8ubuntu0.6+esm12** or later. If unsure, ask your IT team or search "python2.7 UBUNTU-CVE-2021-4189" on the vendor's site.

UBUNTU-CVE-2021-4189 (python2.7) — Attack vector: remote (network-reachable) / unauthenticated / no user interaction Patched: `2.7.6-8ubuntu0.6+esm12` — 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 python2.7.

📍 Affected scope

python2.7 — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **2.7.6-8ubuntu0.6+esm12**.

🛡️ 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 'python2.7' .` 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

1
Identify exposure identify
```
grep -r 'python2.7' . | 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 `python2.7` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade python2.7 to 2.7.6-8ubuntu0.6+esm12
```
ステージング環境で 2.7.6-8ubuntu0.6+esm12 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。
7
Post-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:Pro:14.04:LTS python2.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-8ubuntu0.6+esm12"}]}]

Ubuntu:Pro:14.04:LTS python3.4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.3-1ubuntu1~14.04.7+esm12"}]}]

Ubuntu:Pro:14.04:LTS python3.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.2-2ubuntu0~16.04.4~14.04.1+esm1"}]}]

Ubuntu:Pro:16.04:LTS python2.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.12-1ubuntu0~16.04.18+esm1"}]}]

Ubuntu:Pro:16.04:LTS python3.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.2-2ubuntu0~16.04.13+esm2"}]}]

Ubuntu:18.04:LTS python2.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.17-1~18.04ubuntu1.7"}]}]

Ubuntu:18.04:LTS python3.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.9-1~18.04ubuntu1.7"}]}]

Ubuntu:Pro:18.04:LTS python3.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.5-2ubuntu1~18.04.2+esm3"}]}]

Ubuntu:Pro:18.04:LTS python3.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.0-3ubuntu1~18.04.2+esm2"}]}]

Ubuntu:Pro:20.04:LTS python2.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.18-1~20.04.3+esm1"}]}]

Ubuntu:Pro:22.04:LTS python2.7

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.18-13ubuntu1.1+esm2"}]}]