← Vulnerability feed

Vulnerability record · CVE-2020-14387 · published 27 May 2021

CVE-2020-14387: Samba rsync vulnerability

Samba · Rsync

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.

7.4 CVSS 3.1 High EPSS 1.1% · top 35.2% CWE-297 · CWE-297
7.4CVSS 3.1 base score, v2 5.8
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1875549 Issue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1875549 Issue TrackingPatchThird Party Advisory

Track CVE-2020-14387 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-12084rsync daemon heap buffer overflow via attacker-controlled checksum lengthThe rsync daemon mishandles attacker-controlled checksum lengths (s2length), allowing an out-of-bounds write in the sum2 buffer when MAX_DIGEST_LEN e…EPSS 72%analysed9.8CVE-2017-17434Samba rsync vulnerabilityThe daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the daemon_filter_list data structure (i…EPSS 3.3%9.8CVE-2017-16548Samba rsync out-of-bounds read vulnerabilityThe receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, which allo…EPSS 5.8%9.8CVE-2017-15994Samba rsync vulnerabilityrsync 3.1.3-development before 2017-10-24 mishandles archaic checksums, which makes it easier for remote attackers to bypass intended access restrict…EPSS 1.0%9.1CVE-2026-53791Samba rsync authentication bypass by spoofing vulnerabilityrsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access contro…EPSS 0.50%8.8CVE-2026-70461Samba rsync out-of-bounds write vulnerabilityrsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-control…EPSS 0.57%8.7CVE-2026-70455Samba rsync allocation without limits vulnerabilityrsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt sh…EPSS 0.57%8.6CVE-2026-70463Samba rsync incorrect authorization vulnerabilityrsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses comma-only tokenization when sp…EPSS 0.36%

Source: NIST National Vulnerability Database (record CVE-2020-14387), CISA KEV, FIRST EPSS (scores of 2026-10-06). This page is refreshed as NVD updates the record.