SB2022071362 - Null pointer dereference in Juniper Junos OS

Security Bulletin ID SB2022071362

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Adjecent network

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Null pointer dereference (CVE-ID: CVE-2022-22210)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:A/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 non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to null pointer dereference error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can cause a Denial of Service (DoS).

On QFX5K Series and MX Series, when the PFE receives a specific VxLAN packet the Layer 2 Address Learning Manager (L2ALM) process will crash leading to an FPC reboot.

Continued receipt of this specific packet will create a sustained Denial of Service (DoS) condition.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2022-07-Security-Bulletin-Junos-OS-QFX5000-Series-and-MX-Series-An-l2alm-crash-leading-to-an-FPC-crash-can-be-observed-in-VxLAN-scenario-CVE-2022-22210