CVE-2021-35473 Auth bypass in n/a
Attackers can bypass authentication by using expired OAuth2.0 access tokens due to missing expiration checks in LemonLDAP::NG.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-35473?
CVE-2021-35473 is a critical authentication bypass vulnerability in n/a, published on 10 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in LemonLDAP::NG before 2.0.12. There is a missing expiration check in the OAuth2.0 handler, i.e., it does not verify access token validity. An attacker can use a expired access token from an OIDC client to access the OAuth2 handler The earliest affected version is 2.0.4.
Weakness: CWE-613
Which versions are affected by CVE-2021-35473?
How do I fix CVE-2021-35473?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-35473 being exploited?
There is no known exploitation of CVE-2021-35473 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-35473, GHSA-m833-cpj5-q368, UBUNTU-CVE-2021-35473.