CVE-2021-0205 Details

CVE-2021-0205

Published: 2021-01-15
Last Modified: 2021-01-21
CVE Author: NIST National Vulnerability Database
CVE Assigner: sirt@juniper.net
Summary

When the "Intrusion Detection Service" (IDS) feature is configured on Juniper Networks MX series with a dynamic firewall filter using IPv6 source or destination prefix, it may incorrectly match the prefix as /32, causing the filter to block unexpected traffic. This issue affects only IPv6 prefixes when used as source and destination. This issue affects MX Series devices using MS-MPC, MS-MIC or MS-SPC3 service cards with IDS service configured. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S10 on MX Series; 17.4 versions prior to 17.4R3-S3 on MX Series; 18.1 versions prior to 18.1R3-S11 on MX Series; 18.2 versions prior to 18.2R3-S6 on MX Series; 18.3 versions prior to 18.3R3-S4 on MX Series; 18.4 versions prior to 18.4R3-S6 on MX Series; 19.1 versions prior to 19.1R2-S2, 19.1R3-S3 on MX Series; 19.2 versions prior to 19.2R3-S1 on MX Series; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1 on MX Series; 19.4 versions prior to 19.4R3 on MX Series; 20.1 versions prior to 20.1R2 on MX Series; 20.2 versions prior to 20.2R2 on MX Series;

Analysis
Common Vulnerability Score System v2.0
Severity Medium
Base Score 4.3/10
Exploit Score 8.6/10
Access Vector Network
Access Complexity Medium
Authentication None
Impact Score 2.9/10
Confidentiality Impact None
Availability Impact Partial
Integrity Impact None
Vector String AV:N/AC:M/Au:N/C:N/I:N/A:P
Common Vulnerability Score System v3.1
Severity Medium
Base Score 5.8/10
Exploit Score 3.9/10
Access Vector Network
Access Complexity Low
Privileges Required None
Impact Score 1.4/10
Confidentiality Impact None
Availability Impact Low
Integrity Impact None
Scope Changed
User Interaction None
Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Products Reported
CPE Vulnerable Start Excluding
References

https://kb.juniper.net/JSA11095

CVE ID
CVE-2021-0205
Published
2021-01-15
Modified
2021-01-21
CVSSv2.0
Medium
CVSSv3.1
Medium
PCI Compliance
Pass
US-CERT Alert
No
CWE
CWE Pending

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