CVE-2023-34339 Information disclosure in Ktor

Low 3.3 Published 1 Jun 2023 Updated 8 Jan 2025

Attackers can view sensitive authentication headers in exception messages, potentially exposing credentials in logs or error responses.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-34339?

CVE-2023-34339 is a low-severity vulnerability in JetBrains Ktor, published on 1 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In JetBrains Ktor before 2.3.1 headers containing authentication data could be added to the exception's message

Weakness: CWE-209

Which versions are affected by CVE-2023-34339?

It affects 1 product.

Products include Jetbrains Ktor.

How do I fix CVE-2023-34339?

No fix has been published for CVE-2023-34339 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-34339 being exploited?

There is no known exploitation of CVE-2023-34339 in the wild and no public exploit code.

Sources

Also known as GHSA-w2c4-vpgj-g3jp.