CVE-2019-18849 Memory corruption in n/a

What is CVE-2019-18849?

CVE-2019-18849 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 11 Nov 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment, because of a heap-based buffer over-read involving strdup.

Weakness: CWE-125

Which versions are affected by CVE-2019-18849?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Tnef Project Tnef.

How do I fix CVE-2019-18849?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-18849 being exploited?

There is no known exploitation of CVE-2019-18849 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-2019-18849, DLA-2005-1, DLA-2748-1, GHSA-cq6j-h35c-x8gr, MGASA-2019-0367, UBUNTU-CVE-2019-18849 and 1 more.