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CVE-2022-21689— Denial of Service in Onionshare

Quick assessment

Affected
onionshare onionshare
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.

OnionShare是一种开源工具。用于安全且匿名地共享文件、托管网站以及使用 Tor 网络与朋友聊天。 OnionShare 存在安全漏洞，该漏洞源于在受影响的版本中，接收模式将并发上传限制为每秒100次，并在同一秒内阻止其他上传，这可以由一个简单的脚本触发。访问接收模式的对手可以阻止其他人上传文件。由于tor网络的匿名性，在公开模式下无法阻止这种攻击。

CVSS 7.5 · High EPSS 1.35% · P70

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-21689

Vulnerability Information
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Vulnerability Title
Denial of Service in Onionshare
Source: CVE Program / CVE List V5
Vulnerability Description
OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
OnionShare 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OnionShare是一种开源工具。用于安全且匿名地共享文件、托管网站以及使用 Tor 网络与朋友聊天。 OnionShare 存在安全漏洞，该漏洞源于在受影响的版本中，接收模式将并发上传限制为每秒100次，并在同一秒内阻止其他上传，这可以由一个简单的脚本触发。访问接收模式的对手可以阻止其他人上传文件。由于tor网络的匿名性，在公开模式下无法阻止这种攻击。
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
onionshare onionshare < 2.5 -

II. Public POCs for CVE-2022-21689

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III. Intelligence Information for CVE-2022-21689

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Vendor Advisories for CVE-2022-21689 (1)

Same Patch Batch · onionshare · 2022-01-18 · 9 CVEs total

CVE-2022-21690 8.7 HIGH Cross-Site Scripting in Onionshare
CVE-2022-21688 7.5 HIGH Out-of-bounds Read in Onionshare
CVE-2022-21693 6.3 MEDIUM Path traversal in Onionshare
CVE-2022-21691 4.3 MEDIUM Improper Access Control in Onionshare
CVE-2022-21692 4.3 MEDIUM Improper Access Control in Onionshare
CVE-2022-21695 4.3 MEDIUM Improper Access Control in Onionshare
CVE-2022-21696 4.3 MEDIUM Username spoofing in OnionShare
CVE-2022-21694 3.7 LOW OTF-006: Broken Website Hardening Control: The CSP can be turned on or off but not configu

IV. Related Vulnerabilities

Same product: onionshare
Same vendor: onionshare
Same weakness: CWE-400

V. Comments for CVE-2022-21689

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