Denial of service in Junos OS pkid process

1) Improper Check or Handling of Exceptional Conditions

EUVDB-ID: #VU68274

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22218

CWE-ID: CWE-703 - Improper Check or Handling of 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 when using Certificate Management Protocol Version 2 (CMPv2) auto re-enrollment. A remote attacker can send a malformed response from the Certificate Authority (CA) server and crash the pkid process.

The vulnerability affects Juniper Networks Junos OS on SRX Series.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 19.1 - 21.4R1-S1

External links

http://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-SRX-Series-Upon-processing-of-a-genuine-packet-the-pkid-process-will-crash-during-CMPv2-auto-re-enrollment-CVE-2022-22218

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.