CVE-2020-28023 Information disclosure in n/a

High 7.5 Published 6 May 2021 Updated 4 Aug 2024

An unauthenticated attacker can read sensitive process memory via an out-of-bounds read in the Exim mail server.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-28023?

CVE-2020-28023 is a high-severity vulnerability in Exim Exim, published on 6 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Exim 4 before 4.94.2 allows Out-of-bounds Read. smtp_setup_msg may disclose sensitive information from process memory to an unauthenticated SMTP client.

Weakness: CWE-125

Which versions are affected by CVE-2020-28023?

It affects 1 product.

Products include Exim Exim.

How do I fix CVE-2020-28023?

Upgrade to a fixed version.

Is CVE-2020-28023 being exploited?

There is no known exploitation of CVE-2020-28023 in the wild and no public exploit code.

All Exim Exim vulnerabilities

Sources

Also known as CLEANSTART-2025-JA47557, DEBIAN-CVE-2020-28023, GHSA-9wmp-x8mr-7rgr, UBUNTU-CVE-2020-28023.