Denial of service in Junos OS: QFX10K Series

1) Improper Check for Unusual or Exceptional Conditions

EUVDB-ID: #VU65370

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22217

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper error handling in the Packet Forwarding Engine (PFE) caused by malformed MLD packets looping on a multi-homed Ethernet Segment Identifier (ESI) when VXLAN is configured. A remote attacker can send specially crafted MLD packets to the system and perform a denial of service (DoS) attack.

Mitigation

The vulnerability affects QFX10K Series switches, including the QFX10002, QFX10008, and QFX10016.

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 19.1 - 21.3R1-S2

External links

http://supportportal.juniper.net/s/article/2022-07-Security-Bulletin-Junos-OS-QFX10k-Series-Denial-of-Service-DoS-upon-receipt-of-crafted-MLD-packets-on-multi-homing-ESI-in-VXLAN-CVE-2022-22217

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.