Denial of service in Junos OS and Junos OS Evolved RESV message handling

1) Improper handling of exceptional conditions

EUVDB-ID: #VU68361

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-2022-22238

CWE-ID: CWE-755 - Improper 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 handling of errors in the routing protocol daemon (rpd) when processing incoming RESV message corresponding to a protected LSP. A remote attacker can send specially crafted RESV messages to the affected device and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.2 - 21.3R1-S1-EVO

Juniper Junos OS: 19.4 - 21.3R1-S2

External links

http://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-The-rpd-process-will-crash-when-a-malformed-incoming-RESV-message-is-processed-CVE-2022-22238

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.