CVE-2021-39163— Matrix 信息泄露漏洞
一分钟漏洞结论
影响对象
matrix-org synapse
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
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。
Matrix是一个雄心勃勃的新生态系统，用于开放联合即时消息和 VoIP。 Matrix 1.41.0及之前版本存在信息泄露漏洞，未经授权的用户如果知道房间的ID，就可以访问房间的名称、头像、主题和成员数量。
可能的 ATT&CK 技术 1 AI
T1530 · Data from Cloud Storage
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一、 漏洞 CVE-2021-39163 基础信息
漏洞信息
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Vulnerability Title
Adding a private/unlisted room to a community exposes room metadata in an unauthorised manner.
来源: CVE Program / CVE List V5
Vulnerability Description
Matrix is an ecosystem for open federated Instant Messaging and Voice over IP. In versions 1.41.0 and prior, unauthorised users can access the name, avatar, topic and number of members of a room if they know the ID of the room. This vulnerability is limited to homeservers where the vulnerable homeserver is in the room and untrusted users are permitted to create groups (communities). By default, only homeserver administrators can create groups. However, homeserver administrators can already access this information in the database or using the admin API. As a result, only homeservers where the configuration setting `enable_group_creation` has been set to `true` are impacted. Server administrators should upgrade to 1.41.1 or higher to patch the vulnerability. There are two potential workarounds. Server administrators can set `enable_group_creation` to `false` in their homeserver configuration (this is the default value) to prevent creation of groups by non-administrators. Administrators that are using a reverse proxy could, with partial loss of group functionality, block the endpoints `/_matrix/client/r0/groups/{group_id}/rooms` and `/_matrix/client/unstable/groups/{group_id}/rooms`.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
信息暴露
来源: CVE Program / CVE List V5
Vulnerability Title
Matrix 信息泄露漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Matrix是一个雄心勃勃的新生态系统，用于开放联合即时消息和 VoIP。 Matrix 1.41.0及之前版本存在信息泄露漏洞，未经授权的用户如果知道房间的ID，就可以访问房间的名称、头像、主题和成员数量。
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 |
|---|---|---|---|---|
| matrix-org | synapse | < 1.41.1 | - |
|
二、漏洞 CVE-2021-39163 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-39163 补丁与修复 (1)
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https://github.com/matrix-org/synapse/commit/cb35df940a x_refsource_MISC
CVE-2021-39163 厂商安全公告 (1)
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https://github.com/matrix-org/synapse/security/advisories/GHSA-jj53-8fmw-f2w2 x_refsource_CONFIRM
CVE-2021-39163 邮件列表归档 (2)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VHDEPCZ22GJFMZCWA2XZAGPOEV72POF/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXT7ID7DNBRN2TVTETU3SYQHJKEG6PXN/ vendor-advisory x_refsource_FEDORA
CVE-2021-39163 其他参考 (1)
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https://github.com/matrix-org/synapse/releases/tag/v1.41.1 x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2021-39163
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