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Vulnerability Details : CVE-2020-1681

Receipt of a specifically malformed NDP packet sent from the local area network (LAN) to a device running Juniper Networks Junos OS Evolved can cause the ndp process to crash, resulting in a Denial of Service (DoS). The process automatically restarts without intervention, but a continuous receipt of the malformed NDP packets could leaded to an extended Denial of Service condition. During this time, IPv6 neighbor learning will be affected. The issue occurs when parsing the incoming malformed NDP packet. Rather than simply discarding the packet, the process asserts, performing a controlled exit and restart, thereby avoiding any chance of an unhandled exception. Exploitation of this vulnerability is limited to a temporary denial of service, and cannot be leveraged to cause additional impact on the system. This issue is limited to the processing of IPv6 NDP packets. IPv4 packet processing cannot trigger, and is unaffected by this vulnerability. This issue affects all Juniper Networks Junos OS Evolved versions prior to 20.1R2-EVO. Junos OS is unaffected by this vulnerability.
Publish Date : 2020-10-16 Last Update Date : 2021-10-25
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- CVSS Scores & Vulnerability Types

CVSS Score
3.3
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 755

- Products Affected By CVE-2020-1681

# Product Type Vendor Product Version Update Edition Language
1 OS Juniper Junos Os Evolved 19.2 R1 * * Version Details Vulnerabilities
2 OS Juniper Junos Os Evolved 19.2 R2 * * Version Details Vulnerabilities
3 OS Juniper Junos Os Evolved 19.3 R2 * * Version Details Vulnerabilities
4 OS Juniper Junos Os Evolved 19.4 R1 * * Version Details Vulnerabilities
5 OS Juniper Junos Os Evolved 19.4 R2 * * Version Details Vulnerabilities
6 OS Juniper Junos Os Evolved 19.4 R2-s1 * * Version Details Vulnerabilities
7 OS Juniper Junos Os Evolved 20.1 R1 * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Juniper Junos Os Evolved 7

- References For CVE-2020-1681

https://kb.juniper.net/JSA11078 CONFIRM

- Metasploit Modules Related To CVE-2020-1681

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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