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CVE-2022-39203— Parsing issue in matrix-org/node-irc leading to room takeovers

Quick assessment

Affected
matrix-org matrix-appservice-irc
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 matrix-appservice-irc 0.35.0 之前版本存在资源管理错误漏洞，攻击者利用该漏洞可以指定特定的字符串，这会使桥接器混淆为将攻击者拥有的频道和现有频道组合在一起，从而允许他们在频道中授予自己权限。

CVSS 8.8 · High EPSS 0.86% · P57
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I. Basic Information for CVE-2022-39203

Vulnerability Information
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Vulnerability Title
Parsing issue in matrix-org/node-irc leading to room takeovers
Source: CVE Program / CVE List V5
Vulnerability Description
matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround operators may disable dynamic channel joining via `dynamicChannels.enabled` to prevent users from joining new channels, which prevents any new channels being bridged outside of what is already bridged, and what is specified in the config.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Matrix matrix-appservice-irc 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
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 matrix-appservice-irc 0.35.0 之前版本存在资源管理错误漏洞，攻击者利用该漏洞可以指定特定的字符串，这会使桥接器混淆为将攻击者拥有的频道和现有频道组合在一起，从而允许他们在频道中授予自己权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
matrix-org matrix-appservice-irc < 0.35.0 -

II. Public POCs for CVE-2022-39203

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III. Intelligence Information for CVE-2022-39203

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Vendor Advisories for CVE-2022-39203 (1)

Security Blog Posts for CVE-2022-39203 (1)

IV. Related Vulnerabilities

Same product: matrix-appservice-irc
Same vendor: matrix-org
Same weakness: CWE-269

V. Comments for CVE-2022-39203

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