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CVE-2018-12023 high CVSS 7.5

Unsafe Deserialization in com.fasterxml.jackson.core:jackson-databind (CVE-2018-12023)

Summary

Vulnerability in com.fasterxml.jackson.core:jackson-databind (CVE-2018-12023). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.9.6 or later.

Original description

The description as published by the source.

An issue was discovered in FasterXML jackson-databind prior to 2.7.9.4, 2.8.11.2, and 2.9.6. When Default Typing is enabled (either globally or for a specific property), the service has the Oracle JDBC jar in the classpath, and an attacker can provide an LDAP service to access, it is possible to make the service execute a malicious payload.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory 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 CVE-2018-12023 has been found in com.fasterxml.jackson.core:jackson-databind.
Successful exploitation can lead to full system takeover. CVSS score: 7.5/10.
What to do: upgrade com.fasterxml.jackson.core:jackson-databind to 2.9.6 or later.
If unsure, ask your IT team or search "com.fasterxml.jackson.core:jackson-databind CVE-2018-12023" on the vendor's site.

CVE-2018-12023 (com.fasterxml.jackson.core:jackson-databind) — CWE-502 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated
Patched: 2.9.6 — 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

Unsafe deserialization (CWE-502) exists in com.fasterxml.jackson.core:jackson-databind.

📍 Affected scope

Check the vendor advisory for the affected versions of com.fasterxml.jackson.core:jackson-databind.

🔥 Severity

Severity: High (CVSS 7.5/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2.9.6.

🛡️ 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. Audit SBOM/dependencies to find affected services.

Response actions

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

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで com.fasterxml.jackson.core:jackson-databind を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade com.fasterxml.jackson.core:jackson-databind to 2.9.6

    ステージング環境で 2.9.6 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. 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

Maven com.fasterxml.jackson.core:jackson-databind
[{"type":"ECOSYSTEM","events":[{"introduced":"2.9.0"},{"fixed":"2.9.6"}]}]

References

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