Advisories

Omnispace Agora Project 26.10.0 Predictable Token Information Disclosure via DisplayIcal

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Severity
high
Date
Affecting
  • Agora Project <= 26.10.0

CWE
  • CWE-330 Use of Insufficiently Random Values
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
Geoffrey Robert of akailabs, Valentin Holubec of akailabs
Description
Omnispace Agora Project through 26.10.0 contains a predictable token generation vulnerability that allows unauthenticated attackers to access private calendar data by exploiting a missing dateCrea value that causes the md5Id token to collapse to md5(calendarId.userId), both small enumerable integers. Attackers can compute valid tokens and request the misc&action=DisplayIcal endpoint with a forged md5Id to read any user's private calendar events without authentication.

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