CVE-2019-20421 Denial of service in n/a

What is CVE-2019-20421?

CVE-2019-20421 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Jp2Image::readMetadata() in jp2image.cpp in Exiv2 0.27.2, an input file can result in an infinite loop and hang, with high CPU consumption. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted file.

Weakness: CWE-835

Which versions are affected by CVE-2019-20421?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Exiv2 Exiv2.

How do I fix CVE-2019-20421?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-20421 being exploited?

There is no known exploitation of CVE-2019-20421 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-2019-20421, AZL-7205, CLEANSTART-2024-RC83632, DEBIAN-CVE-2019-20421, GHSA-p4gw-2vrq-j64q, MGASA-2020-0084 and 2 more.