Vulnerability identifier: #VU82487

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-22395

CWE-ID: CWE-401

Exploitation vector: Local 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, adjacent attacker to cause a Denial of Service (DoS).

 In an MPLS scenario specific packets destined to an Integrated Routing and Bridging (irb) interface of the device will cause a buffer (mbuf) to leak.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.3R1 - 21.3R3, 19.3 - 19.3R3-S6, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 20.3 - 20.3R3-S4, 21.4R1 - 21.4R2-S2, 19.4 - 19.4R3-S8, 19.4R1 - 19.4R1-S4, 21.1 - 21.1R3-S2, 21.2R1 - 21.2R3-S1, 22.1R1 - 22.1R1-S2, 20.4 - 20.4R3-S3, 20.2 - 20.2R3-S4

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External links
http://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-In-an-MPLS-scenario-the-processing-of-specific-packets-to-the-device-causes-a-buffer-leak-and-ultimately-a-loss-of-connectivity-CVE-2023-22395

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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