Executive Summary

Informations
Name CVE-2021-0295 First vendor Publication 2021-07-15
Vendor Cve Last vendor Modification 2021-07-28

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Overall CVSS Score 6.1
Base Score 6.1 Environmental Score 6.1
impact SubScore 2.7 Temporal Score 6.1
Exploitabality Sub Score 2.8
 
Attack Vector Adjacent Attack Complexity Low
Privileges Required None User Interaction None
Scope Changed Confidentiality Impact None
Integrity Impact Low Availability Impact Low
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:A/AC:M/Au:N/C:N/I:N/A:P)
Cvss Base Score 2.9 Attack Range Adjacent network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 5.5 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) of Juniper Networks Junos OS on the QFX10K Series switches allows an attacker to trigger a packet forwarding loop, leading to a partial Denial of Service (DoS). The issue is caused by DVMRP packets looping on a multi-homed Ethernet Segment Identifier (ESI) when VXLAN is configured. DVMRP packets received on a multi-homed ESI are sent to the peer, and then incorrectly forwarded out the same ESI, violating the split horizon rule. This issue only affects QFX10K Series switches, including the QFX10002, QFX10008, and QFX10016. Other products and platforms are unaffected by this vulnerability. This issue affects Juniper Networks Junos OS on QFX10K Series: 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 version 18.2R1 and later versions; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S9, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0295

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-697 Insufficient Comparison

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 200

Sources (Detail)

Source Url
CONFIRM https://kb.juniper.net/JSA11208

Alert History

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0
1
Date Informations
2021-07-29 00:23:01
  • Multiple Updates
2021-07-16 00:22:46
  • First insertion