CVE-2022-39255— Matrix 授权问题漏洞
一分钟漏洞结论
影响对象
matrix-org matrix-ios-sdk
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 iOS SDK 0.23.19 版本之前存在安全漏洞，该漏洞源于 matrix-ios-sdk 缺乏必要的检查。
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一、 漏洞 CVE-2022-39255 基础信息
漏洞信息
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Vulnerability Title
Matrix iOS SDK vulnerable ton Olm/Megolm protocol confusion
来源: CVE Program / CVE List V5
Vulnerability Description
Matrix iOS SDK allows developers to build iOS apps compatible with Matrix. Prior to version 0.23.19, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. matrix-ios-sdk version 0.23.19 has been modified to only accept Olm-encrypted to-device messages. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround. To avoid malicious backup attacks, one should not verify one's new logins using emoji/QR verifications methods until patched.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
未进行实体认证的密钥交换
来源: CVE Program / CVE List V5
Vulnerability Title
Matrix 授权问题漏洞
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 iOS SDK 0.23.19 版本之前存在安全漏洞，该漏洞源于 matrix-ios-sdk 缺乏必要的检查。
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 | matrix-ios-sdk | < 0.23.19 | - |
|
二、漏洞 CVE-2022-39255 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-39255 补丁与修复 (1)
CVE-2022-39255 厂商安全公告 (1)
CVE-2022-39255 安全博客文章 (1)
CVE-2022-39255 其他参考 (1)
-
https://github.com/matrix-org/matrix-ios-sdk/releases/tag/v0.23.19 x_refsource_MISC
同批安全公告 · matrix-org · 2022-09-28 · 共 7 条
| CVE-2022-39248 | 8.6 HIGH | Matrix 安全漏洞 |
| CVE-2022-39251 | 8.6 HIGH | Matrix 授权问题漏洞 |
| CVE-2022-39246 | 7.5 HIGH | Matrix 安全漏洞 |
| CVE-2022-39249 | 7.5 HIGH | Matrix 授权问题漏洞 |
| CVE-2022-39257 | 7.5 HIGH | Matrix 授权问题漏洞 |
| CVE-2022-39236 | 4.3 MEDIUM | Matrix 输入验证错误漏洞 |
IV. Related Vulnerabilities
Same product: matrix-ios-sdk
V. Comments for CVE-2022-39255
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