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CVE-2021-0299 Details

Description

An Improper Handling of Exceptional Conditions vulnerability in the processing of a transit or directly received malformed IPv6 packet in Juniper Networks Junos OS results in a kernel crash, causing the device to restart, leading to a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects systems with IPv6 configured. Devices with only IPv4 configured are not vulnerable to this issue. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S1, 20.2R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.4R1.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://kb.juniper.net/JSA11213 CVEVendor Advisory
https://kb.juniper.net/JSA11213 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-755Improper Handling of Exceptional Conditions[email protected]
CWE-755Improper Handling of Exceptional Conditions[email protected]

Affected Products

ProductVersions
juniper junos
19.4 -
19.4 r1
19.4 r1-s1
19.4 r1-s2
19.4 r1-s3

CPE

  • cpe:2.3:o:juniper:junos:19.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r1-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r1-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:19.4:r2-s5:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-0299
NVD Published Date:
Oct 19, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-0299 Details - Not Deferred