Vulnerability identifier: #VU54993

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: CVE-2021-0283

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to a boundary error within the Juniper Junos OS TCP/IP stack. A remote attacker can send specific sequences of packets to the device, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.2R1 - 21.2R1-S2, 21.1 - 21.1R1, 20.4 - 20.4R2-S2, 20.1 - 20.1R3, 19.4 - 19.4R3-S4, 19.4R1 - 19.4R1-S3, 19.2 - 19.2R3-S2, 19.2R1-S4, 19.1 - 19.1R3-S5, 19.1R1-S4, 12.3 - 12.3R12-S18, 19.3 - 19.3R3-S2, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 20.2 - 20.2R3-S1, 18.4 - 18.4R3-S8, 18.4R1-S5, 18.4R2-S3, 15.1 - 15.1R7-S9, 15.1F - 15.1F7-S2, 20.3 - 20.3R2-S1, 18.3 - 18.3R3-S4, 18.3R2-S3, 18.3R3-S1, 18.1 - 18.1R3-S12

---

External links
http://kb.juniper.net/JSA11200

---

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.