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Telegram Desktop版本远程代码执行漏洞已被确认

疑似攻击者通过伪造MIME type实现客户端欺骗，涉及Telegram中的两个API功能——`sendVideo`和`InputFile`。前置条件: Telegram Desktop Windows <＝v4.16.6 + 安装Python环境。

`sendVideo`中的`video`字段支持两种输入方式，“InputFile or String”，问题出在InputFile - Sending by URL时，目标资源可以拥有一个自定义的MIME标签，以指示其他Telegram客户端应该以什么方式加载这个资源。而这些被篡改且不怀好意的`.pyzw`文件，在这里都被指定为了`video/mp4`，导致其他Telegram客户端将以播放器模式展示这个文件。

另外，Telegram Desktop Github 库下一条 PR 中提到一个 Bug，能通过某种方式发送 pyzw 格文件，Telegram 会将其识别为视频文件，实现伪装视频效果，Telegram Desktop的影片播放方式决定了Telegram Desktop将会把这些较小的视讯资源放置在本地下载目录，然后通过“执行”的方式来加载本地影片至内嵌播放器，这也就是为什么在用户点击这些“假影片”后会自动执行攻击者编写的代码。

测试样本

详细技术分析

Telegram Desktop 媒体文件处理存在可用于恶意攻击的漏洞

线索：@ZaiHuabot
投稿：@TNSubmbot
频道：@TestFlightCN

Linux 穷比快乐屋
Forwarded from 软件新闻频道📮在花投稿 (Kenny Lei)
Telegram Desktop版本远程代码执行漏洞已被确认

疑似攻击者通过伪造MIME type实现客户端欺骗，涉及Telegram中的两个API功能——`sendVideo`和`InputFile`。前置条件: Telegram Desktop Windows <＝v4.16.6 + 安装Python环境。

`sendVideo`中的`video`字段支持两种输入方式，“InputFile or String”，问题出在InputFile - Sending by URL时，目标资源可以拥有一个自定义的MIME标签，以指示其他Telegram客户端应该以什么方式加载这个资源。而这些被篡改且不怀好意的`.pyzw`文件，在这里都被指定为了`video/mp4`，导致其他Telegram客户端将以播放器模式展示这个文件。

另外，Telegram Desktop Github 库下一条 PR 中提到一个 Bug，能通过某种方式发送 pyzw 格文件，Telegram 会将其识别为视频文件，实现伪装视频效果，Telegram Desktop的影片播放方式决定了Telegram Desktop将会把这些较小的视讯资源放置在本地下载目录，然后通过“执行”的方式来加载本地影片至内嵌播放器，这也就是为什么在用户点击这些“假影片”后会自动执行攻击者编写的代码。

测试样本

详细技术分析

Telegram Desktop 媒体文件处理存在可用于恶意攻击的漏洞

线索：@ZaiHuabot
投稿：@TNSubmbot
频道：@TestFlightCN
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Newly uncovered hack campaign in Telegram

The campaign, which security firm Check Point has named Rampant Kitten, comprises two main components, one for Windows and the other for Android. Rampant Kitten’s objective is to steal Telegram messages, passwords, and two-factor authentication codes sent by SMS and then also take screenshots and record sounds within earshot of an infected phone, the researchers said in a post published on Friday.

Telegram Desktop版本远程代码执行漏洞已被确认

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