#VU82469 Access of uninitialized pointer in Juniper Junos OS - CVE-2022-22198

Vulnerability identifier: #VU82469

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-2022-22198

CWE-ID: CWE-824

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 access of uninitialized pointer error in the SIP ALG. A remote non-authenticated attacker can cause a Denial of Service (DoS).

Continued receipt of these specific packets will cause a sustained Denial of Service condition.

 On all MX and SRX platforms, if the SIP ALG is enabled, an MS-MPC or MS-MIC, or SPC will crash if it receives a SIP message with a specific contact header format.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1-S1, 20.4R2-S1, 20.4R2-S2, 20.4, 20.4R1, 20.4R2, 21.1R1-S1, 21.1, 21.1R1, 21.1R2, 21.2R1-S1, 21.2R1-S2, 21.2R1

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External links
https://supportportal.juniper.net/s/article/2022-04-Security-Bulletin-Junos-OS-MS-MPC-or-MS-MIC-or-SPC-crashes-if-it-receives-a-SIP-message-with-a-specific-contact-header-format-CVE-2022-22198

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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.