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CVE-2021-37865— Server-side Denial of Service while processing a specifically crafted GIF file

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 6.2 及更早版本存在安全漏洞，该漏洞源于在起草帖子时上传特制的 GIF 文件时未能充分处理，这使得经过身份验证的用户在处理文件时导致资源耗尽，从而导致服务器端拒绝服务。

CVSS 4.3 · Medium EPSS 0.90% · P57
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I. Basic Information for CVE-2021-37865

Vulnerability Information
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Vulnerability Title
Server-side Denial of Service while processing a specifically crafted GIF file
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost 6.2 and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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
Mattermost 资源管理错误漏洞
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 6.2 及更早版本存在安全漏洞，该漏洞源于在起草帖子时上传特制的 GIF 文件时未能充分处理，这使得经过身份验证的用户在处理文件时导致资源耗尽，从而导致服务器端拒绝服务。
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 unspecified ~ 6.2 -

II. Public POCs for CVE-2021-37865

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III. Intelligence Information for CVE-2021-37865

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Other References for CVE-2021-37865 (2)

Same Patch Batch · Mattermost · 2022-01-18 · 4 CVEs total

CVE-2021-37866 4.7 MEDIUM Session is not invalidated on server-side when user logged out of Boards
CVE-2021-37867 4.3 MEDIUM Emails of all users are exposed via one of the Boards APIs
CVE-2021-37864 2.6 LOW Users can view the contents of an archived channel when access is explicitly denied by the

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-37865

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