#VU21756 Input validation error in Juniper Junos OS - CVE-2019-0066

Vulnerability identifier: #VU21756

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-2019-0066

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 cause a denial of service (DoS) condition on the target system.

The vulnerability exists due to an unexpected status return value weakness in the Next-Generation Multicast VPN (NG-mVPN) service. A remote attacker can send a specially crafted IPv4 packet to the device running BGP and cause a denial of service condition and core the routing protocol daemon (rpd) process.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Juniper Junos OS: 15.1R - 15.1X53-D67, 16.1R1 - 16.1R3, 16.2R1-S1 - 16.2R2, 17.1R1-S1 - 17.1R2, 17.2R1-S1 - 17.2R2-S1, 17.3R1-S1 - 17.3R2

---

External links
https://kb.juniper.net/JSA10965
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/ng-mvpn-services-enabling.html

---

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.