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CVE-2021-43859

Vulnerability in com.thoughtworks.xstream:xstream (CVE-2021-43859)

Summary

Vulnerability in com.thoughtworks.xstream:xstream (CVE-2021-43859). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 1.4.19 or later.

Original description

The description as published by the source.

XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.

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-2021-43859 has been found in com.thoughtworks.xstream:xstream.
Risk of unauthorized operations or information disclosure.
What to do: upgrade com.thoughtworks.xstream:xstream to 1.4.19 or later.
If unsure, ask your IT team or search "com.thoughtworks.xstream:xstream CVE-2021-43859" on the vendor's site.

CVE-2021-43859 (com.thoughtworks.xstream:xstream) — CWE-400
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.4.19 — 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 (CWE-400) exists in com.thoughtworks.xstream:xstream.

📍 Affected scope

Check the vendor advisory for the affected versions of com.thoughtworks.xstream:xstream.

🔥 Severity

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

🔧 How to fix

Update to 1.4.19.

🛡️ 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.thoughtworks.xstream:xstream 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.thoughtworks.xstream:xstream to 1.4.19

    ステージング環境で 1.4.19 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.thoughtworks.xstream:xstream
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.19"}]}]
Bitnami jenkins
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.319.3"},{"introduced":"2.321.0"},{"fixed":"2.334.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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