Vulnerability identifier: #VU82473

Vulnerability 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-2023-22408

CWE-ID: CWE-129

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.

The vulnerability exists due to improper validation of array index error in the SIP ALG. A remote non-authenticated attacker can cause a Denial of Service (DoS).

 When an attacker sends an SIP packets with a malformed SDP field then the SIP ALG can not process it which will lead to an FPC crash and restart.

Continued receipt of these specific packets will lead to a sustained Denial of Service.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 22.2R1 - 22.2R2-S2, 21.3R1 - 21.3R3-S2, 22.3R1, 21.4R1 - 21.4R3-S1, 21.1 - 21.1R3-S3, 20.4 - 20.4R3-S4, 22.1R1 - 22.1R2-S1, 21.2R1 - 21.2R3-S2

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External links
http://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-SRX-5000-Series-Upon-processing-of-a-specific-SIP-packet-an-FPC-can-crash-CVE-2023-22408

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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 Internet.

Is there known malware, which exploits this vulnerability?

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