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CVE-2021-39150 (GCVE-0-2021-39150)

Vulnerability from cvelistv5 – Published: 2021-08-23 18:20 – Updated: 2024-08-04 01:58
VLAI
Title
A Server-Side Forgery Request vulnerability in XStream via PriorityQueue unmarshaling
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version CPE status
x-stream xstream Affected: < 1.4.18
guessed Create a notification for this product.
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream\u0027s security framework with a whitelist limited to the minimal required types. If you rely on XStream\u0027s default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.\"}, {\"lang\": \"es\", \"value\": \"XStream es una sencilla biblioteca para serializar objetos a XML y viceversa. En las versiones afectadas, esta vulnerabilidad puede permitir a un atacante remoto requerir datos de recursos internos que no est\\u00e1n disponibles p\\u00fablicamente s\\u00f3lo al manipular el flujo de entrada procesado con una versi\\u00f3n 14 hasta 8 de Java runtime. No est\\u00e1 afectado ning\\u00fan usuario que haya seguido la recomendaci\\u00f3n de configurar el framework de seguridad de XStream con una lista blanca limitada a los tipos m\\u00ednimos necesarios. Si conf\\u00eda en la lista negra por defecto de XStream de [Security Framework](https://x-stream.github.io/security.html#framework), tendr\\u00e1 que usar al menos la versi\\u00f3n 1.4.18.\"}]",
      "id": "CVE-2021-39150",
      "lastModified": "2024-11-21T06:18:43.070",
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-04T18:06:52+00:00",
      "cve": "CVE-2021-39150",
      "id": "CVE-2021-39150",
      "initial_release_date": "2021-08-22T00:00:00+00:00",
      "product_status:fixed": "17",
      "product_status:known_affected": "9",
      "product_status:known_not_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "xstream: Server-side request forgery (SSRF) via unsafe deserialization of com.sun.xml.internal.ws.client.sei.*",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-39150.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-08T00:20:16Z",
      "cve": "CVE-2021-39150",
      "id": "CVE-2021-39150",
      "initial_release_date": "2023-02-15T03:38:23Z",
      "product_status:known_affected": "394",
      "product_status:recommended": "69",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-39150",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-39150.json",
      "version": "35"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.