CVE-2020-1681: Junos OS Evolved: Receipt of a specifically malformed NDP packet could lead to Denial of Service
First published: Fri Oct 16 2020(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Junos Os Evolved | =19.2-r1 | |
| Juniper Junos Os Evolved | =19.2-r2 | |
| Juniper Junos Os Evolved | =19.3-r2 | |
| Juniper Junos Os Evolved | =19.4-r1 | |
| Juniper Junos Os Evolved | =19.4-r2 | |
| Juniper Junos Os Evolved | =19.4-r2-s1 | |
| Juniper Junos Os Evolved | =20.1-r1 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.1R2-EVO, 20.2R1-EVO, and all subsequent releases.
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Reference Links
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- agent/softwarecombine
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- source/MITRE
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- agent/severity
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- agent/event
- agent/tags
- vendor/juniper
- canonical/juniper junos os evolved
- version/juniper junos os evolved/19.2-r1
- version/juniper junos os evolved/19.2-r2
- version/juniper junos os evolved/19.3-r2
- version/juniper junos os evolved/19.4-r1
- version/juniper junos os evolved/19.4-r2
- version/juniper junos os evolved/19.4-r2-s1
- version/juniper junos os evolved/20.1-r1