CVE-2020-14387

Severity: high (CVSS 7.4 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: 2021-05-27 · updated 2026-06-17
Weakness: CWE-297

Description

A flaw was found in rsync in versions since 3.2.0pre1. Rsync improperly validates certificate with host mismatch vulnerability. A remote, unauthenticated attacker could exploit the flaw by performing a man-in-the-middle attack using a valid certificate for another hostname which could compromise confidentiality and integrity of data transmitted using rsync-ssl. The highest threat from this vulnerability is to data confidentiality and integrity. This flaw affects rsync versions before 3.2.4.

Affected products

RsyncProject rsync: from 3.2.1 before 3.2.4; 3.2.0, 3.2.0-pre1, 3.2.0-pre2, 3.2.0-pre3 — fixed in 3.2.4

How to fix

Upgrade to a fixed version: RsyncProject rsync 3.2.4. Check the vendor advisory for mitigations.

References

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