Debian update for mosquitto

Published: 2019-02-11 17:23:31
Severity Medium
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2018-12546
CVE-2018-12550
CVE-2018-12551
CVSSv3 3.8 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
4.9 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CWE ID CWE-264
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software mosquitto (Debian package)
Vulnerable software versions mosquitto (Debian package) 1.4.10-3+deb9u2
mosquitto (Debian package) 1.4.10-3+deb9u1
mosquitto (Debian package) 1.4.3-1

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Vendor URL Debian

Security Advisory

1) Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote authenticated user to gain access to potentially sensitive information.

The vulnerability exists due to an error when messages were still delivered to clients after their access to topic was revoked. A remote authenticated user was able to obtain potentially sensitive information.

Remediation

Update the affected package to version: 1.4.10-3+deb9u3.

External links

https://www.debian.org/security/2019/dsa-4388

2) Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to insecure default permissions to topics and messages, if the ACL file is blank. A remote attacker can gain unauthorized access to sensitive information.


Remediation

Update the affected package to version: 1.4.10-3+deb9u3.

External links

https://www.debian.org/security/2019/dsa-4388

3) Input validation error

Description

The vulnerability allows a remote attacker to bypass password authentication.

The vulnerability exists due to insufficient validation of malformed input in a password file, when it is used for authentication. Incorrect data in password file will be treated by the application as a username with empty password, allowing attacker to gain unauthorized access to the application.

Remediation

Update the affected package to version: 1.4.10-3+deb9u3.

External links

https://www.debian.org/security/2019/dsa-4388

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