CVE-2019-14855 Weak cryptography in gnupg2

What is CVE-2019-14855?

CVE-2019-14855 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 20 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

Weakness: CWE-326

Which versions are affected by CVE-2019-14855?

It affects 3 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Gnupg Gnupg.

How do I fix CVE-2019-14855?

Upgrade to a fixed version.

Is CVE-2019-14855 being exploited?

There is no known exploitation of CVE-2019-14855 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 ALPINE-CVE-2019-14855, CLEANSTART-2026-ZK42816, DEBIAN-CVE-2019-14855, GHSA-cpvm-f36g-55vg, MGASA-2019-0348, UBUNTU-CVE-2019-14855 and 1 more.