What’s Vulnerable › Vulnerabilities

CVE-2019-20421

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-27 · updated 2026-06-17
• Weakness: CWE-835

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.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.10
• Debian Linux: 9.0, 10.0
• exiv2: 0.27.2

References

• https://github.com/Exiv2/exiv2/commit/a82098f4f90cd86297131b5663c3dec6a34470e8
• https://github.com/Exiv2/exiv2/issues/1011
• https://lists.debian.org/debian-lts-announce/2021/08/msg00028.html
• https://usn.ubuntu.com/4270-1/
• https://www.debian.org/security/2021/dsa-4958
• https://github.com/Exiv2/exiv2/commit/a82098f4f90cd86297131b5663c3dec6a34470e8
• https://github.com/Exiv2/exiv2/issues/1011
• https://lists.debian.org/debian-lts-announce/2021/08/msg00028.html
• https://usn.ubuntu.com/4270-1/
• https://www.debian.org/security/2021/dsa-4958

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