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CVE-2021-21341— XStream can cause a Denial of Service

Quick assessment

Affected
x-stream xstream
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XStream是Xstream团队的一个轻量级的、简单易用的开源Java类库，它主要用于将对象序列化成XML（JSON）或反序列化为对象。 XStream 1.4.16 之前版本存在代码问题漏洞，该漏洞允许远程攻击者根据CPU类型或此类有效负载的并行执行，导致拒绝服务。

CVSS 7.5 · High EPSS 77.80% · P100

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
x-stream xstream < 1.4.16 affected
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I. Basic Information for CVE-2021-21341

Vulnerability Information
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Vulnerability Title
XStream can cause a Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which 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. 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, you will have to use at least version 1.4.16.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
XStream 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XStream是Xstream团队的一个轻量级的、简单易用的开源Java类库，它主要用于将对象序列化成XML（JSON）或反序列化为对象。 XStream 1.4.16 之前版本存在代码问题漏洞，该漏洞允许远程攻击者根据CPU类型或此类有效负载的并行执行，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
x-stream xstream < 1.4.16 -

II. Public POCs for CVE-2021-21341

# POC Description Source Link Shenlong Link
1 XStream DoS CVE-2021-21341 https://github.com/s-index/CVE-2021-21341 POC Details
2 None https://github.com/Mani1325/ka-cve-2021-21341 POC Details
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III. Intelligence Information for CVE-2021-21341

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Vendor Advisories for CVE-2021-21341 (6)

Mailing List Discussions for CVE-2021-21341 (6)

Security Blog Posts for CVE-2021-21341 (2)

Same Patch Batch · x-stream · 2021-03-22 · 11 CVEs total

CVE-2021-21346 6.1 MEDIUM XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-21347 6.1 MEDIUM XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-21349 6.1 MEDIUM A Server-Side Forgery Request can be activated unmarshalling with XStream to access data s
CVE-2021-21345 5.8 MEDIUM XStream is vulnerable to a Remote Command Execution attack
CVE-2021-21351 5.4 MEDIUM XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-21342 5.3 MEDIUM A Server-Side Forgery Request can be activated unmarshalling with XStream to access data s
CVE-2021-21343 5.3 MEDIUM XStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling a
CVE-2021-21344 5.3 MEDIUM XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-21348 5.3 MEDIUM XStream is vulnerable to an attack using Regular Expression for a Denial of Service (ReDos
CVE-2021-21350 5.3 MEDIUM XStream is vulnerable to an Arbitrary Code Execution attack

IV. Related Vulnerabilities

Same product: xstream
Same vendor: x-stream
Same weakness: CWE-400

V. Comments for CVE-2021-21341

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