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CVE-2021-21246— Pre-Auth Access token leak

Quick assessment

Affected
theonedev onedev
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.

Theonedev Onedev是Theonedev团队的一个基于JAVA的多合一DevOps平台。该平台支持容器构建、编排、CI、Git管理、团队协作等功能，帮助开发者构建一个简单、功能强大的开发平台。 Theonedev Onedev before version 4.0.3 存在信息泄露漏洞，攻击者可利用该漏洞访问敏感数据。

CVSS 8.6 · High EPSS 49.05% · P99

Public Exploits 1

Nuclei · 1 CVE-2021-21246.yaml [template]
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I. Basic Information for CVE-2021-21246

Vulnerability Information
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Vulnerability Title
Pre-Auth Access token leak
Source: CVE Program / CVE List V5
Vulnerability Description
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, the REST UserResource endpoint performs a security check to make sure that only administrators can list user details. However for the `/users/{id}` endpoint there are no security checks enforced so it is possible to retrieve arbitrary user details including their Access Tokens! These access tokens can be used to access the API or clone code in the build spec via the HTTP(S) protocol. It has permissions to all projects accessible by the user account. This issue may lead to `Sensitive data leak` and leak the Access Token which can be used to impersonate the administrator or any other users. This issue was addressed in 4.0.3 by removing user info from restful api.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Theonedev Onedev 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Theonedev Onedev是Theonedev团队的一个基于JAVA的多合一DevOps平台。该平台支持容器构建、编排、CI、Git管理、团队协作等功能，帮助开发者构建一个简单、功能强大的开发平台。 Theonedev Onedev before version 4.0.3 存在信息泄露漏洞，攻击者可利用该漏洞访问敏感数据。
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
theonedev onedev < 4.0.3 -

II. Public POCs for CVE-2021-21246

# POC Description Source Link Shenlong Link
1 OneDev before version 4.0.3 contains an insecure endpoint that allows retrieval of arbitrary user details, including access tokens, due to missing security checks on /users/{id}, letting attackers leak sensitive data and impersonate users, exploit requires no special conditions. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21246.yaml POC Details
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III. Intelligence Information for CVE-2021-21246

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Patches & Fixes for CVE-2021-21246 (1)

Vendor Advisories for CVE-2021-21246 (1)

Same Patch Batch · theonedev · 2021-01-15 · 10 CVEs total

CVE-2021-21242 10.0 CRITICAL Pre-Auth Unsafe Deserialization on AttachmentUploadServet
CVE-2021-21243 10.0 CRITICAL Pre-Auth Unsafe Deserialization on KubernetesResource
CVE-2021-21244 10.0 CRITICAL Pre-Auth SSTI via Bean validation message tampering
CVE-2021-21245 10.0 CRITICAL Pre-Auth Arbitrary File Upload
CVE-2021-21247 9.6 CRITICAL Post-Auth Unsafe Deserialization on BasePage (AJAX)
CVE-2021-21248 9.6 CRITICAL Post-Auth Arbitrary Code execution via Groovy script injection
CVE-2021-21249 9.6 CRITICAL Post-Auth Unsafe Yaml deserialization
CVE-2021-21250 7.7 HIGH Post-Auth External Entity Expansion (XXE)
CVE-2021-21251 7.7 HIGH ZipSlip Arbitrary File Upload

IV. Related Vulnerabilities

Same product: onedev
Same vendor: theonedev
Same weakness: CWE-862

V. Comments for CVE-2021-21246

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