Denial of service in Junos OS SNMP processing

1) Loop with unreachable exit condition ('infinite loop')

EUVDB-ID: #VU82432

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1600

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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

In a Point-to-Multipoint (P2MP) Label Switched Path (LSP) scenario, an uncontrolled resource consumption vulnerability in the Routing Protocol Daemon (RPD) in Juniper Networks Junos OS allows a specific SNMP request to trigger an infinite loop causing a high CPU usage Denial of Service (DoS) condition. This issue affects both SNMP over IPv4 and IPv6.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3x48 - 15.1X53-D237

External links

http://supportportal.juniper.net/s/article/2020-01-Security-Bulletin-Junos-OS-A-specific-SNMP-command-can-trigger-a-high-CPU-usage-Denial-of-Service-in-the-RPD-daemon-CVE-2020-1600

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.