CVE-2017-0897 Weak cryptography in ExpressionEngine

Q: Is CVE-2017-0897 being exploited?

There is no known exploitation of CVE-2017-0897 in the wild and no public exploit code.

Q: How do I fix CVE-2017-0897?

No fix has been published for CVE-2017-0897 yet. Limit exposure of the affected software until one is available.

High 7.5 Published 22 Jun 2017 Updated 5 Aug 2024

Weak entropy in ExpressionEngine signing tokens allows attackers to guess tokens and achieve remote code execution.

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-2017-0897?

CVE-2017-0897 is a high-severity vulnerability in EllisLab ExpressionEngine, published on 22 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.

Weakness: CWE-331, CWE-330

Which versions are affected by CVE-2017-0897?

It affects 1 product.

Products include Expressionengine Expressionengine.

How do I fix CVE-2017-0897?

No fix has been published for CVE-2017-0897 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-0897 being exploited?

There is no known exploitation of CVE-2017-0897 in the wild and no public exploit code.

Sources

Also known as GHSA-cqj4-ph2f-7q79.