CVE-2020-23356 Auth bypass in n/a

High 7.5 Published 27 Jan 2021 Updated 4 Aug 2024

Attackers can bypass authentication in nibbleblog by exploiting type juggling in password hash comparison, leading to unauthorized access.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-23356?

CVE-2020-23356 is a high-severity authentication bypass vulnerability in n/a, published on 27 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

dmin/kernel/api/login.class.phpin in nibbleblog v3.7.1c allows type juggling for login bypass because == is used instead of === for password hashes, which mishandles hashes that begin with 0e followed by exclusively numerical characters.

Which versions are affected by CVE-2020-23356?

It affects 1 product.

Products include Nibbleblog Nibbleblog.

How do I fix CVE-2020-23356?

No fix has been published for CVE-2020-23356 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-23356 being exploited?

There is no known exploitation of CVE-2020-23356 in the wild and no public exploit code.

Sources

Also known as GHSA-g7cc-v7v6-m885.