SB2019092905 - Denial of service in Eclipse Mosquitto
Published: September 29, 2019
Security Bulletin ID
SB2019092905
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2019-11779)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when processing an overly long SUBSCRIBE packet containing a topic that consists of approximately 65400 or more '/' characters. A malicious MQTT client can send a specially crafted SUBSCRIBE packet, trigger stack overflow and perform denial of service attack.
Remediation
Install update from vendor's website.