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CVE-2021-44151

Status Candidate

Overview

An issue was discovered in Reprise RLM 14.2. As the session cookies are small, an attacker can hijack any existing sessions by bruteforcing the 4 hex-character session cookie on the Windows version (the Linux version appears to have 8 characters). An attacker can obtain the static part of the cookie (cookie name) by first making a request to any page on the application (e.g., /goforms/menu) and saving the name of the cookie sent with the response. The attacker can then use the name of the cookie and try to request that same page, setting a random value for the cookie. If any user has an active session, the page should return with the authorized content, when a valid cookie value is hit.

Related Files

Reprise License Manager 14.2 Session Hijacking
Posted Dec 8, 2021
Authored by Andreas Fyhn Andersen, Mark Staal Steenberg, Oliver Lind Nordestgaard, Gionathan Armando Reale, Bilal El Ghoul

Reprise License Manager version 14.2 suffers from an unauthenticated session hijacking vulnerability via brute forcing. The vendor has contacted Packet Storm to note that in v15.1 they fixed this issue by updating the session cookie size to 40 bytes, from the previous 4 bytes on Windows and 8 bytes on Linux.

tags | exploit
advisories | CVE-2021-44151
SHA-256 | 908696ef80c1b6e9be550123ff1923741a359a0f31aaf0e10ba48e8fb8ab37a2
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