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CVE-2021-21350— XStream is vulnerable to an Arbitrary Code Execution attack

Quick assessment

Affected
x-stream xstream
Exploitation
High exploitation probability; assess promptly
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（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，攻击者可利用该漏洞仅通过操作已处理的输入流来执行任意代码。

CVSS 5.3 · Medium EPSS 15.23% · P97

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-21350

Vulnerability Information
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Vulnerability Title
XStream is vulnerable to an Arbitrary Code Execution attack
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 a vulnerability which may allow a remote attacker to execute arbitrary code 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:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
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（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，攻击者可利用该漏洞仅通过操作已处理的输入流来执行任意代码。
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-2021-21350

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III. Intelligence Information for CVE-2021-21350

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Vendor Advisories for CVE-2021-21350 (6)

Mailing List Discussions for CVE-2021-21350 (6)

Security Blog Posts for CVE-2021-21350 (2)

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

CVE-2021-21341 7.5 HIGH XStream can cause a Denial of Service
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

IV. Related Vulnerabilities

Same product: xstream
Same vendor: x-stream
Same weakness: CWE-434

V. Comments for CVE-2021-21350

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