#VU82501 Memory leak in Juniper Junos OS - CVE-2022-22209

Vulnerability identifier: #VU82501

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-22209

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

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

A Missing Release of Memory after Effective Lifetime vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a Denial of Service (DoS).

 On all Junos platforms, the Kernel Routing Table (KRT) queue can get stuck due to a memory leak triggered by interface flaps or route churn leading to RIB and PFEs getting out of sync.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.2R1-S1, 21.2R1-S2, 21.2R2-S1, 21.2R2-S2, 21.2R1, 21.2R2, 21.3R1-S1, 21.3R1-S2, 21.3R1, 21.3R2, 21.4R1-S1, 21.4R1

---

External links
https://supportportal.juniper.net/s/article/2022-07-Security-Bulletin-Junos-OS-RIB-and-PFEs-can-get-out-of-sync-due-to-a-memory-leak-caused-by-interface-flaps-or-route-churn-CVE-2022-22209

---

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.