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CVE-2024-23649— Lemmy 授权问题漏洞

一分钟漏洞结论

影响对象
LemmyNet lemmy
利用判断
存在公开或 AI PoC，应优先验证
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Lemmy是Lemmy开源的一款用于构建社交新闻聚合器和网络论坛的自由软件。 Lemmy 0.17.0版本至0.19.1之前版本存在授权问题漏洞，该漏洞源于任何经过身份验证的用户都可以获取任意私人消息内容。

CVSS 7.5 · High EPSS 0.51% · P42

可能的 ATT&CK 技术 1 AI

T1005 · Data from Local System
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一、 漏洞 CVE-2024-23649 基础信息

漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
Any authenticated user may obtain private message details from other users on the same instance
来源: CVE Program / CVE List V5
Vulnerability Description
Lemmy is a link aggregator and forum for the fediverse. Starting in version 0.17.0 and prior to version 0.19.1, users can report private messages, even when they're neither sender nor recipient of the message. The API response to creating a private message report contains the private message itself, which means any user can just iterate over message ids to (loudly) obtain all private messages of an instance. A user with instance admin privileges can also abuse this if the private message is removed from the response, as they're able to see the resulting reports. Creating a private message report by POSTing to `/api/v3/private_message/report` does not validate whether the reporter is the recipient of the message. lemmy-ui does not allow the sender to report the message; the API method should likely be restricted to accessible to recipients only. The API response when creating a report contains the `private_message_report_view` with all the details of the report, including the private message that has been reported: Any authenticated user can obtain arbitrary (untargeted) private message contents. Privileges required depend on the instance configuration; when registrations are enabled without application system, the privileges required are practically none. When registration applications are required, privileges required could be considered low, but this assessment heavily varies by instance. Version 0.19.1 contains a patch for this issue. A workaround is available. If an update to a fixed Lemmy version is not immediately possible, the API route can be blocked in the reverse proxy. This will prevent anyone from reporting private messages, but it will also prevent exploitation before the update has been applied.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
Lemmy 授权问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Lemmy是Lemmy开源的一款用于构建社交新闻聚合器和网络论坛的自由软件。 Lemmy 0.17.0版本至0.19.1之前版本存在授权问题漏洞，该漏洞源于任何经过身份验证的用户都可以获取任意私人消息内容。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
LemmyNet lemmy >= 0.17.0, < 0.19.1 -

二、漏洞 CVE-2024-23649 的公开POC

# POC 描述 源链接 神龙链接
AI 生成 POC 已实测靶场 高级
Qwen3.6-35B-A3B · 18437 chars
Pro+ 专属包含：
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完整可执行 POC 代码
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三、漏洞 CVE-2024-23649 的情报信息

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CVE-2024-23649 补丁与修复 (1)

CVE-2024-23649 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: lemmy
Same vendor: LemmyNet
Same weakness: CWE-285

V. Comments for CVE-2024-23649

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