CVE-2021-3445

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-19 · updated 2026-06-17
Weakness: CWE-347

Description

A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

Fedoraproject Fedora: 33, 34
Red Hat Enterprise Linux: 8.0
Rpm Libdnf: before 0.60.1 — fixed in 0.60.1

How to fix

Upgrade to a fixed version: Rpm Libdnf 0.60.1. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1932079
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPMFGGQ5T6WVFTFX3OKMVTTM5O4EXWZR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4NL7TNWAHJ6JVRABQUPWHKKCTHUZMNF/
https://bugzilla.redhat.com/show_bug.cgi?id=1932079
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPMFGGQ5T6WVFTFX3OKMVTTM5O4EXWZR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4NL7TNWAHJ6JVRABQUPWHKKCTHUZMNF/

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