Denial of service in Junos OS BBE configurations

1) Improper input validation

EUVDB-ID: #VU82431

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-2020-1608

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Problem Receipt of a specific packet on the core facing interface of an MX Series device configured for Broadband Edge (BBE) service may trigger a kernel crash (vmcore), causing the device to reboot. The issue is specific to the processing of packets destined to BBE clients connected to MX Series subscriber management platforms.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 17.2 - 19.3

External links

http://supportportal.juniper.net/s/article/2020-01-Security-Bulletin-Junos-OS-MX-Series-In-BBE-configurations-receipt-of-a-specific-packet-causes-a-Denial-of-Service-CVE-2020-1608

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.