CVE-2021-41580 Improper Access Control in passport-oauth2
Attackers can bypass authentication if the OAuth provider returns HTTP 200 on failure and the application trusts the token without validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-41580?
CVE-2021-41580 is a medium-severity authentication bypass vulnerability in n/a, published on 27 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The passport-oauth2 package before 1.6.1 for Node.js mishandles the error condition of failure to obtain an access token. This is exploitable in certain use cases where an OAuth identity provider uses an HTTP 200 status code for authentication-failure error reports, and an application grants authorization upon simply receiving the access token (i.e., does not try to use the token). NOTE: the passport-oauth2 vendor does not consider this a passport-oauth2 vulnerability
Which versions are affected by CVE-2021-41580?
2 open source packages ship an affected version, including passport-oauth2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
passport-oauth2 npm | All versions | 1.6.1 |
passport-oauth2 npm | All versions | 1.6.1 |
Products include Passportjs Passport-Oauth2.
How do I fix CVE-2021-41580?
Upgrade passport-oauth2 to 1.6.1 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-41580 being exploited?
There is no known exploitation of CVE-2021-41580 in the wild and no public exploit code.
Sources
Also known as GHSA-f794-r6xc-hf3v.