Buffer overflow in Junos OS - CVE-2021-0227
Published: April 15, 2021
Vulnerability identifier: #VU52253
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-2021-0227
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform DoS attack.
The vulnerability exists due to a boundary error when processing HTTP requests in Juniper Networks Junos OS J-Web on SRX Series devices. A remote attacker can send specially crafted HTTP requests to the system, trigger memory corruption and perform a denial of service (DoS) attack.
Affected software
Junos OS
How to mitigate CVE-2021-0227
Install updates from vendor's website.
Junos OS - addressed in versions 17.3R3-S9, 17.4R2-S11, 17.4R3-S2, 18.2R3-S5, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R3, 19.4R2-S1, 19.4R3, 20.1R1-S2, 20.1R2, 20.2R1