Vulnerability identifier: #VU85273
Vulnerability 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:
CWE-ID:
CWE-770
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Junos OS Evolved
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 allocation of resources without limits or throttling error in the kernel. A remote non-authenticated attacker can cause a Denial of Service (DoS).
If a high rate of specific valid packets are processed by the routing engine (RE) this will lead to a loss of connectivity of the RE with other components of the chassis and thereby a complete and persistent system outage.
Please note that a carefully designed lo0 firewall filter will block or limit these packets which should prevent this issue from occurring.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Junos OS Evolved: 20.4R1-EVO - 20.4R3-S6-EVO, 20.4R2-S2-EVO, 21.4R1-EVO - 21.4R3-S4-EVO, 22.1-EVO - 22.1R3-S1-EVO, 22.2-EVO - 22.2R2-S2-EVO, 22.3R1-EVO - 22.3R1-S2-EVO, 22.4R1-EVO - 22.4R1-S2-EVO
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.