#VU21757 Input validation error in Juniper Junos OS - CVE-2019-0065

Vulnerability identifier: #VU21757

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-2019-0065

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing SIP packets. A remote attacker can send a specially crafted SIP packet, crash the MS-PIC component on MS-MIC or MS-MPC and cause a sustained denial of service condition on the target sysem.

Note: This issue affects Junos OS on MX Series when the SIP ALG is enabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 16.1R - 16.1R7, 16.2R1-S1 - 16.2R2, 17.1R1-S1 - 17.1R2, 17.2R1-S1 - 17.2R3, 17.3R1-S1 - 17.3R3, 17.4R1-S1 - 17.4R2, 18.1R1 - 18.1R3, 18.2R1-S3 - 18.2R2, 18.3R1-S1 - 18.3R1, 18.4R1-S1 - 18.4R1

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External links
https://kb.juniper.net/JSA10964

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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.