CVE-2023-38691
CVSS 3.1 Score 6.5 of 10 (medium)
Details
Published Aug 4, 2023
Updated: Aug 11, 2023
CWE ID 287
Summary
CVE-2023-38691 is a vulnerability affecting matrix-appservice-bridge's provisioning API. In versions 4.0.0 and prior to 8.1.2 and 9.0.1, a malicious Matrix server can manipulate OpenID exchanges by using a foreign user's MXID. By doing so, an attacker can impersonate other users and perform provisioning requests. The flaw occurs because the library does not verify that the `sub` parameter's servername matches the server being communicated with. Versions 8.1.2 and 9.0.1 include a patch, but a workaround is to disable the provisioning API.
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Affected Vendors
- El Paso Multi-Agency Tactical Response Information eXchange
Advisories, Assessments, and Mitigations
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