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CVE-2021-41180— Geolocation preview links can be set to arbitrary links in nextcloud talk

Quick assessment

Affected
nextcloud security-advisories
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.

Nextcloud Talk是德国Nextcloud公司的一款自托管的本地音频/视频和聊天通信服务。 Nextcloud Talk 存在输入验证错误漏洞，该漏洞源于在 12.1.2 之前的版本中，由于缺乏对链接的验证，攻击者能够控制 Nextcloud Talk 应用程序中的地理位置预览链接。 这可能会导致打开重定向，但需要用户交互。 这仅影响 Android Talk 客户端的用户。

CVSS 4.7 · Medium EPSS 1.04% · P63

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-41180

Vulnerability Information
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Vulnerability Title
Geolocation preview links can be set to arbitrary links in nextcloud talk
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud talk is a self hosting messaging service. In versions prior 12.1.2 an attacker is able to control the link of a geolocation preview in the Nextcloud Talk application due to a lack of validation on the link. This could result in an open-redirect, but required user interaction. This only affected users of the Android Talk client. It is recommended that the Nextcloud Talk App is upgraded to 12.1.2. There are no known workarounds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud Talk 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud Talk是德国Nextcloud公司的一款自托管的本地音频/视频和聊天通信服务。 Nextcloud Talk 存在输入验证错误漏洞，该漏洞源于在 12.1.2 之前的版本中，由于缺乏对链接的验证，攻击者能够控制 Nextcloud Talk 应用程序中的地理位置预览链接。 这可能会导致打开重定向，但需要用户交互。 这仅影响 Android Talk 客户端的用户。
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
nextcloud security-advisories < 12.1.2 -

II. Public POCs for CVE-2021-41180

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III. Intelligence Information for CVE-2021-41180

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Patches & Fixes for CVE-2021-41180 (1)

Vendor Advisories for CVE-2021-41180 (1)

Other References for CVE-2021-41180 (1)

Same Patch Batch · nextcloud · 2022-03-08 · 4 CVEs total

CVE-2021-41239 5.3 MEDIUM User enumeration setting not respected in Nextcloud server
CVE-2021-41241 4.3 MEDIUM Advanced permissions is not respected for subfolders in Nextcloud server
CVE-2021-41181 2.4 LOW Nextcloud Talk app exposes chat messages on lockscreen

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-601

V. Comments for CVE-2021-41180

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