Denial of service in Junos OS and Junos OS Evolved rpd



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-22225
CWE-ID CWE-367
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Junos OS Evolved
Operating systems & Components / Operating system

Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Time-of-check Time-of-use (TOCTOU) Race Condition

EUVDB-ID: #VU68272

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-22225

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in the Routing Protocol Daemon (rpd). In a BGP multipath scenario, when one of the contributing routes is flapping often and rapidly, rpd may crash.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4R1-EVO - 21.3-EVO

Juniper Junos OS: 19.2R1-S1 - 21.3R1

CPE2.3 External links

https://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-In-a-BGP-multipath-scenario-when-one-of-the-contributing-routes-is-flapping-often-and-rapidly-rpd-may-crash-CVE-2022-22225


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.



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