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CVE-2019-14893 critical CVSS 9.8

Information Disclosure in com.fasterxml.jackson.core:jackson-databind (CVE-2019-14893)

Summary

Vulnerability in com.fasterxml.jackson.core:jackson-databind (CVE-2019-14893). Successful exploitation can lead to full system takeover. Exploitable via Id.CLASS. Mitigation: upgrade to 2.9.10 or later.

Original description

The description as published by the source.

A flaw was discovered in FasterXML jackson-databind in all versions before 2.9.10 and 2.10.0, where it would permit polymorphic deserialization of malicious objects using the xalan JNDI gadget when used in conjunction with polymorphic type handling methods such as enableDefaultTyping() or when @JsonTypeInfo is using Id.CLASS or Id.MINIMAL_CLASS or in any other way which ObjectMapper.readValue might instantiate objects from unsafe sources. An attacker could use this flaw to execute arbitrary code.

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-2019-14893 has been found in com.fasterxml.jackson.core:jackson-databind.
Attackers can target a specific entry point like Id.CLASS over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade com.fasterxml.jackson.core:jackson-databind to 2.9.10 or later.
If unsure, ask your IT team or search "com.fasterxml.jackson.core:jackson-databind CVE-2019-14893" on the vendor's site.

CVE-2019-14893 (com.fasterxml.jackson.core:jackson-databind) — CWE-200 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Id.CLASS / Id.MINIMAL_CLASS
Patched: 2.9.10 — 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

Information disclosure (CWE-200) exists in com.fasterxml.jackson.core:jackson-databind. Attackers reach the vulnerable code path via Id.CLASS without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of com.fasterxml.jackson.core:jackson-databind. Attack surface: Id.CLASS / Id.MINIMAL_CLASS.

🔥 Severity

Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2.9.10.

🛡️ 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 2.9.10

    ステージング環境で 2.9.10 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":"2.9.10"}]}]

References

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