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Echo: rsync: security update to 3.4.1+ds1-5+deb13u3

medium Tenable Self-Hosted Container Security Plugin ID 459721

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in
 recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process.
 Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a
 specially crafted file list where the first sorted entry is not the leading dot directory, followed by a
 transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes
 before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in
 a deterministic SIGSEGV crash of the rsync client. (CVE-2026-43620)

Solution

Update the rsync library and its related packages to version 3.4.1+ds1-5+deb13u3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-43620

Plugin Details

Severity: Medium

ID: 459721

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-43620

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/20/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-43620

IAVA: 2026-A-0502