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CVE-2021-39139— 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 1.4.17及之前版本存在代码问题漏洞，远程攻击者可以通过操纵处理后的输入流，从远程主机加载和执行任意代码。

CVSS 8.5 · High EPSS 4.54% · P91

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
x-stream xstream < 1.4.18 affected
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I. Basic Information for CVE-2021-39139

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 simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
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 1.4.17及之前版本存在代码问题漏洞，远程攻击者可以通过操纵处理后的输入流，从远程主机加载和执行任意代码。
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 < 1.4.18 -

II. Public POCs for CVE-2021-39139

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III. Intelligence Information for CVE-2021-39139

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Vendor Advisories for CVE-2021-39139 (6)

Mailing List Discussions for CVE-2021-39139 (4)

Security Blog Posts for CVE-2021-39139 (1)

Same Patch Batch · x-stream · 2021-08-23 · 14 CVEs total

CVE-2021-39141 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39144 8.5 HIGH XStream is vulnerable to a Remote Command Execution attack
CVE-2021-39145 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39146 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39147 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39148 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39149 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39150 8.5 HIGH A Server-Side Forgery Request vulnerability in XStream via PriorityQueue unmarshaling
CVE-2021-39151 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39152 8.5 HIGH A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling
CVE-2021-39153 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39154 8.5 HIGH XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39140 6.5 MEDIUM XStream can cause a Denial of Service

IV. Related Vulnerabilities

Same product: xstream
Same vendor: x-stream
Same weakness: CWE-502

V. Comments for CVE-2021-39139

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