Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2024-39839— Remote username set to an arbitrary string by remote user

Quick assessment

Affected
Mattermost Mattermost
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.

Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost 存在安全漏洞，该漏洞源于当共享频道启用时，无法禁止用户设置自己的远程用户名，这允许远程用户将其远程用户名属性设置为任意字符串，只要用户之前未同步过，该字符串就会同步到本地服务器。

CVSS 4.3 · Medium EPSS 0.34% · P25
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2024-39839

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Remote username set to an arbitrary string by remote user
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost 存在安全漏洞，该漏洞源于当共享频道启用时，无法禁止用户设置自己的远程用户名，这允许远程用户将其远程用户名属性设置为任意字符串，只要用户之前未同步过，该字符串就会同步到本地服务器。
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
Mattermost Mattermost 9.9.0 -

II. Public POCs for CVE-2024-39839

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-39839

请登录查看更多情报信息。

Same Patch Batch · Mattermost · 2024-08-01 · 10 CVEs total

CVE-2024-39274 8.7 HIGH Malicious remote can add users to arbitrary teams and channels
CVE-2024-39777 8.7 HIGH Malicious remote can invite itself to an arbitrary local channel
CVE-2024-36492 7.4 HIGH Existing local user overwritten by malicious remote
CVE-2024-39832 6.8 MEDIUM Permanently local data deletion by malicious remote
CVE-2024-41144 5.5 MEDIUM Malicious remote can create/update/delete arbitrary posts in arbitrary channels
CVE-2024-41162 4.1 MEDIUM Malicious remote can make an arbitrary local channel read-only
CVE-2024-39837 3.8 LOW Malicious remote can create arbitrary channels
CVE-2024-29977 2.7 LOW Malicious remote can create arbitrary reactions on arbitrary posts
CVE-2024-41926 2.7 LOW Malicious remote can claim that a user was synced from another remote

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-284

V. Comments for CVE-2024-39839

No comments yet

Leave a comment