Resource exhaustion in Junos OS and Junos OS Evolved - CVE-2021-0291
Published: July 15, 2021
Vulnerability identifier: #VU54913
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2021-0291
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within the SNMP Agent Extensibility (agentx) process. A remote attacker can trigger resource exhaustion by sending specially crafted traffic to port 705/TCP and perform a denial of service (DoS) attack.
Affected software
Junos OS
Junos OS Evolved
Junos OS Evolved
How to mitigate CVE-2021-0291
Install updates from vendor's website.
Junos OS - addressed in versions 15.1R7-S9, 17.3R3-S12, 17.4R2-S13, 17.4R3-S5, 18.3R3-S5, 18.4R2-S8, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3, 20.1R2, 20.2R2, 20.2R3, 20.3R2, 20.4R1
Junos OS Evolved - addressed in versions 20.3R2-EVO, 20.4R1-EVO
Junos OS Evolved - addressed in versions 20.3R2-EVO, 20.4R1-EVO