SB2018042528 - Input validation error in Eclipse Mosquitto

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2017-7652)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote authenticated user to execute arbitrary code.

In Eclipse Mosquitto 1.4.14, if a Mosquitto instance is set running with a configuration file, then sending a HUP signal to server triggers the configuration to be reloaded from disk. If there are lots of clients connected so that there are no more file descriptors/sockets available (default limit typically 1024 file descriptors on Linux), then opening the configuration file will fail.

Remediation

Install update from vendor's website.

References

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=530102
• https://lists.debian.org/debian-lts-announce/2018/03/msg00037.html
• https://lists.debian.org/debian-lts-announce/2018/06/msg00016.html
• https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
• https://www.debian.org/security/2018/dsa-4325