CVE-2020-3812 Information disclosure in netqmail

What is CVE-2020-3812?

CVE-2020-3812 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 26 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail-verify runs as root and tests for the existence of files in the attacker's home directory, without dropping its privileges first.

Weakness: CWE-269

Which versions are affected by CVE-2020-3812?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Netqmail Netqmail.

How do I fix CVE-2020-3812?

Apply the vendor's patch.

Is CVE-2020-3812 being exploited?

There is no known exploitation of CVE-2020-3812 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w98m-2722-xcvc, UBUNTU-CVE-2020-3812.