Vulnerability in openjdk-11 (DEBIAN-CVE-2021-35565)

Summary

Vulnerability in openjdk-11 (DEBIAN-CVE-2021-35565). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 11.0.13+8-1~deb11u1 or later.

Original description

The description as published by the source.

Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Java SE: 7u311, 8u301, 11.0.12; Oracle GraalVM Enterprise Edition: 20.3.3 and 21.2.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Oracle GraalVM Enterprise Edition. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Source: OSV.dev (Open Source Vulnerabilities) OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as DEBIAN-CVE-2021-35565 has been found in openjdk-11.
Risk of unauthorized operations or information disclosure.
What to do: upgrade openjdk-11 to 11.0.13+8-1~deb11u1 or later.
If unsure, ask your IT team or search "openjdk-11 DEBIAN-CVE-2021-35565" on the vendor's site.

DEBIAN-CVE-2021-35565 (openjdk-11)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 11.0.13+8-1~deb11u1 — 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 openjdk-11.

📍 Affected scope

Check the vendor advisory for the affected versions of openjdk-11.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 11.0.13+8-1~deb11u1.

🛡️ 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 'openjdk-11' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'openjdk-11' . | 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 openjdk-11 を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade openjdk-11 to 11.0.13+8-1~deb11u1
```
ステージング環境で 11.0.13+8-1~deb11u1 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を含めること。
3
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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Debian:11 openjdk-11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"11.0.13+8-1~deb11u1"}]}]

References

advisory security-tracker.debian.org