CVE-2019-19920 Code injection in n/a

What is CVE-2019-19920?

CVE-2019-19920 is a high-severity code injection vulnerability in Canonical Ubuntu Linux, published on 22 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

sa-exim 4.2.1 allows attackers to execute arbitrary code if they can write a .cf file or a rule. This occurs because Greylisting.pm relies on eval (rather than direct parsing and/or use of the taint feature). This issue is similar to CVE-2018-11805.

Weakness: CWE-78

Which versions are affected by CVE-2019-19920?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Sa-Exim Project Sa-Exim.

How do I fix CVE-2019-19920?

Apply the vendor's patch.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2019-19920 being exploited?

There is no known exploitation of CVE-2019-19920 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 DEBIAN-CVE-2019-19920, DLA-2062-1, GHSA-28xw-m7jp-89ch, UBUNTU-CVE-2019-19920, USN-4520-1.