Resource management error in Juniper Junos OS

1) Resource management error

EUVDB-ID: #VU19144

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-0048

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. Due to this bug, when a firewall filter is applied on the loopback interface, other firewall filters might stop working for multicast traffic. A remote attacker can send a specially crafted request to the loopback interface to stop other firewall filters work.

This issue only affects the EX4300 switch with TCAM optimization enabled:

• set system packet-forwarding-options tcam-group-optimization

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 14.1x53 - 18.3R1-S4

External links

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10942&cat=SIRT_1&actp=LIST

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.