#VU57439 Improper Check for Unusual or Exceptional Conditions in Juniper Networks, Inc. products - CVE-2021-31361


Vulnerability identifier: #VU57439

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-31361

CWE-ID: CWE-754

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system
PTX Series
Hardware solutions / Firmware
QFX Series
Hardware solutions / Firmware

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to improper check for unusual or exceptional conditions. A remote attacker can send specially crafted IP packets and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 17.3R1-S1 - 17.3R3, 17.4R1-S1 - 17.4R3, 18.1R1 - 18.1R4, 18.2R1-S3 - 18.2R3, 18.3R1-S1 - 18.3R3, 18.4R1-S1 - 18.4R3, 19.1R - 19.1R3, 19.2R1-S1 - 19.2R3, 19.3R1-S1 - 19.3R3, 19.4R1-S1 - 19.4R3, 20.1R1-S1 - 20.1R1, 20.2R1-S1 - 20.2R2-S3, 20.3R1-S2 - 20.3R1, 20.4R1-S1 - 20.4R2, 21.1R1

PTX Series: All versions

QFX Series: All versions


External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11223&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.


Latest bulletins with this vulnerability