CVE-2023-2808— Lack of URL normalization allows rendering previews for disallowed domains
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存在输入验证错误漏洞，该漏洞源于在确定是否应为超链接生成预览时，Mattermost 未能规范化 UTF 易混淆字符，攻击者利用该漏洞可以使用特制链接在不允许的域上触发链接预览。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2023-2808
Vulnerability Information
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Vulnerability Title
Lack of URL normalization allows rendering previews for disallowed domains
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link.
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
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于在确定是否应为超链接生成预览时，Mattermost 未能规范化 UTF 易混淆字符，攻击者利用该漏洞可以使用特制链接在不允许的域上触发链接预览。
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 | 0 ~ 7.1.9 | - |
|
II. Public POCs for CVE-2023-2808
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2023-2808 (1)
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V. Comments for CVE-2023-2808
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