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CVE-2021-32836— Pre-auth unsafe deserialization in ZStack

Quick assessment

Affected
zstackio zstack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZStack是一个开源 IaaS（基础设施即服务）软件，旨在自动化数据中心，通过 API 管理计算、存储和网络资源。 Zstack 存在代码问题漏洞，该漏洞源于在 3.10.12 和 4.1.6 版本之前的 ZStack 中，REST API 中存在预认证不安全反序列化漏洞。

CVSS 7.5 · High EPSS 2.04% · P81
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I. Basic Information for CVE-2021-32836

Vulnerability Information
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Vulnerability Title
Pre-auth unsafe deserialization in ZStack
Source: CVE Program / CVE List V5
Vulnerability Description
ZStack is open source IaaS(infrastructure as a service) software. In ZStack before versions 3.10.12 and 4.1.6 there is a pre-auth unsafe deserialization vulnerability in the REST API. An attacker in control of the request body will be able to provide both the class name and the data to be deserialized and therefore will be able to instantiate an arbitrary type and assign arbitrary values to its fields. This issue may lead to a Denial Of Service. If a suitable gadget is available, then an attacker may also be able to exploit this vulnerability to gain pre-auth remote code execution. For additional details see the referenced GHSL-2021-087.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
ZStack 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZStack是一个开源 IaaS（基础设施即服务）软件，旨在自动化数据中心，通过 API 管理计算、存储和网络资源。 Zstack 存在代码问题漏洞，该漏洞源于在 3.10.12 和 4.1.6 版本之前的 ZStack 中，REST API 中存在预认证不安全反序列化漏洞。
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
zstackio zstack < 3.10.12 -

II. Public POCs for CVE-2021-32836

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III. Intelligence Information for CVE-2021-32836

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Vendor Advisories for CVE-2021-32836 (1)

Other References for CVE-2021-32836 (1)

IV. Related Vulnerabilities

Same product: zstack
Same vendor: zstackio
Same weakness: CWE-94

V. Comments for CVE-2021-32836

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