NULL pointer dereference in Junos OS - CVE-2021-0206
Published: January 13, 2021
Vulnerability identifier: #VU49516
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-2021-0206
CWE-ID: CWE-476
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 a NULL pointer dereference error in Juniper Networks Junos OS when SSL Proxy is configured. A remote attacker can send specially crafted packet to the system causing the packet forwarding engine (PFE) to crash and restart
Affected software
Junos OS
How to mitigate CVE-2021-0206
This issue affects Juniper Networks Junos OS on NFX Series and SRX Series:
- 18.3 versions prior to 18.3R3-S4;
- 18.4 versions prior to 18.4R3-S1;
- 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3;
- 19.2 versions prior to 19.2R1-S2, 19.2R2;
- 19.3 versions prior to 19.3R2.
Install updates from vendor's website.
Junos OS - addressed in versions 18.3R3-S4, 18.4R3-S1, 19.1R1-S6, 19.1R2-S2, 19.1R3, 19.2R1-S2, 19.2R2, 19.3R2, 19.4R1