Vulnerability identifier: #VU88437
Vulnerability risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-754
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Junos OS Evolved
Operating systems & Components /
Operating system
Juniper Junos OS
Operating systems & Components /
Operating system
Vendor: Juniper Networks, Inc.
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an improper check for unusual or exceptional conditions error in the Layer 2 Address Learning Daemon (l2ald). A remote non-authenticated attacker can cause a Denial of Service (DoS).
When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control.
Repeated occurrences of these events causes a sustained DoS condition.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Junos OS Evolved: 21.4R1-EVO - 21.4R3-S4-EVO, 22.1-EVO - 22.1R3-S3-EVO, 22.2-EVO - 22.2R3-S2-EVO, 22.3R1-EVO - 22.3R3-EVO, 22.4R1-EVO - 22.4R2-S1-EVO, 22.4R2-S2-EVO, 23.2R1-EVO - 23.2R1-S1-EVO, 23.2R1-S2-EVO
Juniper Junos OS: 20.4R1 - 20.4R3-S9, 21.2R1 - 21.2R3-S6, 21.4R1 - 21.4R3-S4, 22.1R1 - 22.1R3-S3, 22.2R1 - 22.2R3-S2, 22.3R1 - 22.3R2-S2, 22.4R1 - 22.4R2-S2, 22.4R3-S1, 23.2R1-S1, 23.4R1-S1
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.