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CVE-2021-42743— Local privilege escalation via a default path in Splunk Enterprise Windows

Quick assessment

Affected
Splunk Splunk Enterprise
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.

Splunk是美国Splunk公司的一套数据收集分析软件。该软件主要用于收集、索引和分析及其所产生的数据，包括所有IT系统和基础结构（物理、虚拟机和云）生成的数据。 基于Windows的Splunk Enterprise 8.1.1 之前版本存在安全漏洞，该漏洞源于默认路径的错误配置，攻击者利用该漏洞可将本地权限从权限较低的用户升级到Splunk用户。

CVSS 8.8 · High EPSS 0.23% · P12

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-42743

Vulnerability Information
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Vulnerability Title
Local privilege escalation via a default path in Splunk Enterprise Windows
Source: CVE Program / CVE List V5
Vulnerability Description
A misconfiguration in the node default path allows for local privilege escalation from a lower privileged user to the Splunk user in Splunk Enterprise versions before 8.1.1 on Windows.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk Enterprise 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk是美国Splunk公司的一套数据收集分析软件。该软件主要用于收集、索引和分析及其所产生的数据，包括所有IT系统和基础结构（物理、虚拟机和云）生成的数据。 基于Windows的Splunk Enterprise 8.1.1 之前版本存在安全漏洞，该漏洞源于默认路径的错误配置，攻击者利用该漏洞可将本地权限从权限较低的用户升级到Splunk用户。
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
Splunk Splunk Enterprise 8.1 version(s) before 8.1.1 -

II. Public POCs for CVE-2021-42743

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III. Intelligence Information for CVE-2021-42743

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Other References for CVE-2021-42743 (1)

Same Patch Batch · Splunk · 2022-05-06 · 7 CVEs total

CVE-2022-26889 8.8 HIGH Path Traversal in search parameter results in external content injection
CVE-2022-27183 8.8 HIGH Reflected XSS in a query parameter of the Monitoring Console
CVE-2021-26253 8.1 HIGH Bypass of Splunk Enterprise's implementation of DUO MFA
CVE-2021-31559 7.5 HIGH S2S TcpToken authentication bypass
CVE-2021-33845 5.3 MEDIUM Username enumeration through lockout message in REST API
CVE-2022-26070 4.3 MEDIUM Error message discloses internal path

IV. Related Vulnerabilities

Same product: Splunk Enterprise
Same vendor: Splunk
Same weakness: CWE-427

V. Comments for CVE-2021-42743

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