PT-2018-3529 · Eclipse+2 · Eclipse Mosquitto+2

Yan Jia · Published 2018-12-03 · Updated 2019-10-26 · CVE-2018-12550

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Eclipse Mosquitto versions 1.0 through 1.5.5

Description: The issue is related to the configuration of the access control list (ACL) file in Eclipse Mosquitto. When the ACL file is empty or contains only comments or blank lines, Mosquitto previously used a default allow policy. However, the new behavior is to deny all access if the ACL file is empty. This change in behavior may lead to unexpected configuration issues. The vulnerability is also related to insufficient input validation and incorrect implementation of functions, which may allow a remote attacker to gain unauthorized access to protected information.

Recommendations: For Eclipse Mosquitto versions 1.0 through 1.5.5, ensure that the ACL file is properly configured and not empty to avoid denying all access. As a temporary workaround, consider defining a default ACL policy to minimize the risk of exploitation. Restrict access to the broker until a proper ACL configuration is in place.

Fix

Weakness Enumeration

CWE-440

Related Identifiers

ALT-PU-2019-1213

BDU:2020-03295

CVE-2018-12550

DLA-1972-1

DSA-4388-1

DSA-4388-2

OPENSUSE-SU-2019:0233-1

OPENSUSE-SU-2019:0237-1

OPENSUSE-SU-2019_0233-1

OPENSUSE-SU-2024:11057-1

Affected Products

Alt Linux

Eclipse Mosquitto

Suse

References · 25

• https://bdu.fstec.ru/vul/2020-03295 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-12550 · Security Note
• https://osv.dev/vulnerability/DSA-4388-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-12550 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-12550 · Vendor Advisory
• https://bugs.eclipse.org/bugs/show_bug.cgi?id=541870 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1972-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-12550 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-12550 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2019:0237-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-12550 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2018-12550 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-12550 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4388-2 · Vendor Advisory
• https://suse.com/security/cve/CVE-2018-12550 · Note