GHSA-vhmj-5q9r-mm9g BlastRADIUS also affects eduMFA
Attackers can bypass RADIUS authentication in eduMFA by modifying intercepted packets, allowing unauthorized access to accounts protected by RADIUS tokens.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is GHSA-vhmj-5q9r-mm9g?
GHSA-vhmj-5q9r-mm9g is an authentication bypass vulnerability in edumfa, published on 17 Jul 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Summary
BlastRADIUS (see blastradius.fail for details) also affects eduMFA prior version 2.2.0, because the Message-Authenticator attributes were not checked.
Details
Website with the vulnerability information blastradius.fail The original vulnerability has been assigned CVE-2024-3596 Case in vince: https://kb.cert.org/vuls/id/456537
PoC
There is no known proof-of-concept except for the attack shown in the paper from the researchers
Impact
An attacker can trigger an authentication flow with a RADIUS-backed token, intercept the RADIUS packet sent by eduMFA and modify the RADIUS server's answer, which would lead eduMFA to believe that the token is valid, even though the RADIUS servers answer was a reject.
Which versions are affected by GHSA-vhmj-5q9r-mm9g?
2 open source packages ship an affected version, including edumfa.
| Package | Affected | Fixed in |
|---|---|---|
edumfa PyPI | All versions | 2.2.0 |
edumfa PyPI | All versions | 2.2.0 |
How do I fix GHSA-vhmj-5q9r-mm9g?
Upgrade edumfa to 2.2.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is GHSA-vhmj-5q9r-mm9g being exploited?
There is no known exploitation of GHSA-vhmj-5q9r-mm9g in the wild and no public exploit code.