SB2023100601 - Junos OS and Junos OS Evolved update for MQTT
Published: October 6, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Input validation error (CVE-ID: CVE-2017-7653)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of not valid UTF-8 string. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.
2) Memory leak (CVE-ID: CVE-2017-7654)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak. A remote attacker can send specially crafted CONNECT packets to force the application to leak memory and perform denial of service attack.
3) NULL pointer dereference (CVE-ID: CVE-2017-7655)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in lib/messages_mosq.c. A remote attacker can perform a denial of service (DoS) attack against the application, using the vulnerable library.
Remediation
Install update from vendor's website.