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Alpine: multiple isync packages: security update to 1.4.4-r0

critical Tenable Self-Hosted Container Security Plugin ID 427616

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

 - A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB)
 IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders,
 could cause several different buffer overflows, which could conceivably be exploited for remote code
 execution. (CVE-2021-3657)

 - A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or
 compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an
 empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.
 (CVE-2021-44143)

See Also

https://security.alpinelinux.org/vuln/CVE-2021-3657

https://security.alpinelinux.org/vuln/CVE-2021-44143

Plugin Details

Severity: Critical

ID: 427616

Version: Revision 1.5

Type: Local

Published: 5/16/2025

Updated: 12/11/2025

Supported Sensors: Agentless Assessment

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.15

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-44143

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 11/22/2021

Reference Information

CVE: CVE-2021-3657, CVE-2021-44143