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CVE-2023-2797— Path traversal in GitHub plugin's code preview feature

Quick assessment

Affected
Mattermost Mattermost Github Plugin
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，该漏洞源于无法清理代码永久链接，导致攻击者可以通过在通道上发布特制的链接来预览代码。

CVSS 3.1 · Low EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2023-2797

Vulnerability Information
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Vulnerability Title
Path traversal in GitHub plugin's code preview feature
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost fails to sanitize code permalinks, allowing an attacker to preview code from private repositories by posting a specially crafted permalink on a channel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 注入漏洞
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，该漏洞源于无法清理代码永久链接，导致攻击者可以通过在通道上发布特制的链接来预览代码。
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 Github Plugin 0 ~ 7.1.9 -

II. Public POCs for CVE-2023-2797

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III. Intelligence Information for CVE-2023-2797

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Other References for CVE-2023-2797 (1)

Same Patch Batch · Mattermost · 2023-06-16 · 11 CVEs total

CVE-2023-2793 6.5 MEDIUM Stack exhaustion in PreparePostForClientWithEmbedsAndImages
CVE-2023-2792 6.5 MEDIUM Ephemeral messages return private channel contents in permalink previews
CVE-2023-2787 6.5 MEDIUM Collapsed Reply Threads APIs leak message contents from private channels
CVE-2023-2788 6.2 MEDIUM Deactivated user can retain access using oauth2 api
CVE-2023-2785 4.3 MEDIUM Specially crafted search query can cause large log entries in postgres
CVE-2023-2831 4.3 MEDIUM Denial of Service while unescaping a Markdown string
CVE-2023-2791 4.3 MEDIUM Playbooks lets you edit arbitrary posts
CVE-2023-2786 4.3 MEDIUM Channel commands execution doesn't properly verify permissions
CVE-2023-2783 4.3 MEDIUM App Framework does not checks for the secret provided in the incoming webhook request
CVE-2023-2784 4.2 MEDIUM Apps Framework allows install requests from regular members via an internal path

IV. Related Vulnerabilities

Same vendor: Mattermost
Same weakness: CWE-74

V. Comments for CVE-2023-2797

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