Vulnerability Information
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Vulnerability Title
Truncated content of messages can be leaked from matrix-appservice-irc
Vulnerability Description
matrix-appservice-irc is a Node.js IRC bridge for the Matrix messaging protocol. matrix-appservice-irc before version 2.0.0 can be exploited to leak the truncated body of a message if a malicious user sends a Matrix reply to an event ID they don't have access to. As a precondition to the attack, the malicious user needs to know the event ID of the message they want to leak, as well as to be joined to both the Matrix room and the IRC channel it is bridged to. The message reply containing the leaked message content is visible to IRC channel members when this happens. matrix-appservice-irc 2.0.0 checks whether the user has permission to view an event before constructing a reply. Administrators should upgrade to this version. It's possible to limit the amount of information leaked by setting a reply template that doesn't contain the original message. See these lines `601-604` in the configuration file linked.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vulnerability Type
不充分权限或特权的处理不恰当
Vulnerability Title
matrix-appservice-irc 安全漏洞
Vulnerability Description
matrix-appservice-irc是Matrix的一款网桥。这个网桥会将所有 IRC 消息传递给 Matrix，并将所有 Matrix 消息传递给 IRC。 matrix-appservice-irc 2.0.0之前版本存在安全漏洞。攻击者利用该漏洞可以获取敏感信息。
CVSS Information
N/A
Vulnerability Type
N/A