Vulnerability identifier: #VU82480

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-2023-22394

CWE-ID: CWE-20

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.

An Improper Handling of Unexpected Data Type vulnerability when handling SIP calls in Juniper Networks Junos OS on SRX Series and MX Series platforms allows an attacker to cause a memory leak leading to Denial of Services (DoS).  This issue occurs on all MX Series platforms with MS-MPC or MS-MIC card and all SRX Series platforms where SIP ALG is enabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.1 - 21.1R3-S4, 22.1R1 - 22.1R1-S1, 20.3 - 20.3R3-S5, 20.2 - 20.2R3-S5, 19.4 - 19.4R2-S7, 19.4R1 - 19.4R1-S4, 20.4 - 20.4R3-S4, 19.3 - 19.3R3-S6, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 21.4R1 - 21.4R2-S1, 21.2R1 - 21.2R3, 21.3R1 - 21.3R2-S2

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External links
http://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-SRX-Series-and-MX-Series-Memory-leak-due-to-receipt-of-specially-crafted-SIP-calls-CVE-2023-22394

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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.