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CVE-2022-21688— Out-of-bounds Read 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，该漏洞源于受影响的桌面应用程序版本被发现容易通过QT图像解析中的一个未公开的漏洞来拒绝服务。大约20个字节会导致2GB的内存消耗，这可以被多次触发。要被滥用，这个漏洞需要在历史选项卡中呈现，因此需要一些用户交互。

CVSS 7.5 · High EPSS 0.79% · P53

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-21688

Vulnerability Information
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Vulnerability Title
Out-of-bounds Read 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. Affected versions of the desktop application were found to be vulnerable to denial of service via an undisclosed vulnerability in the QT image parsing. Roughly 20 bytes lead to 2GB memory consumption and this can be triggered multiple times. To be abused, this vulnerability requires rendering in the history tab, so some user interaction is required. An adversary with knowledge of the Onion service address in public mode or with authentication in private mode can perform a Denial of Service attack, which quickly results in out-of-memory for the server. This requires the desktop application with rendered history, therefore the impact is only elevated. This issue has been patched in version 2.5.
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
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
OnionShare 缓冲区错误漏洞
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，该漏洞源于受影响的桌面应用程序版本被发现容易通过QT图像解析中的一个未公开的漏洞来拒绝服务。大约20个字节会导致2GB的内存消耗，这可以被多次触发。要被滥用，这个漏洞需要在历史选项卡中呈现，因此需要一些用户交互。
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-2022-21688

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III. Intelligence Information for CVE-2022-21688

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Vendor Advisories for CVE-2022-21688 (1)

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

CVE-2022-21690 8.7 HIGH Cross-Site Scripting in Onionshare
CVE-2022-21689 7.5 HIGH Denial of Service 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-125

V. Comments for CVE-2022-21688

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