Vulnerability Details CVE-2021-0261
A vulnerability in the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through with Web-Redirect, and Captive Portal allows an unauthenticated attacker to cause an extended Denial of Service (DoS) for these services by sending a high number of specific requests. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S17 on EX Series; 12.3X48 versions prior to 12.3X48-D105 on SRX Series; 15.1 versions prior to 15.1R7-S8; 15.1X49 versions prior to 15.1X49-D230 on SRX Series; 16.1 versions prior to 16.1R7-S8; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; 20.2 versions prior to 20.2R1-S1, 20.2R2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 62.0%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
Products affected by CVE-2021-0261
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cpe:2.3:h:juniper:ex2300-c:-
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cpe:2.3:h:juniper:ex2300:-
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cpe:2.3:h:juniper:ex3400:-
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cpe:2.3:h:juniper:ex4300:-
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cpe:2.3:h:juniper:ex4400:-
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cpe:2.3:h:juniper:ex4600:-
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cpe:2.3:h:juniper:ex4650:-
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cpe:2.3:h:juniper:ex9200:-
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cpe:2.3:h:juniper:ex9250:-
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cpe:2.3:h:juniper:srx1500:-
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cpe:2.3:h:juniper:srx300:-
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cpe:2.3:h:juniper:srx320:-
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cpe:2.3:h:juniper:srx340:-
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cpe:2.3:h:juniper:srx345:-
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cpe:2.3:h:juniper:srx380:-
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cpe:2.3:h:juniper:srx4100:-
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cpe:2.3:h:juniper:srx4200:-
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cpe:2.3:h:juniper:srx4600:-
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cpe:2.3:h:juniper:srx5400:-
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cpe:2.3:h:juniper:srx550:-
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cpe:2.3:h:juniper:srx5600:-
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cpe:2.3:h:juniper:srx5800:-
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cpe:2.3:o:juniper:junos:12.3
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cpe:2.3:o:juniper:junos:12.3x48
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cpe:2.3:o:juniper:junos:15.1
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cpe:2.3:o:juniper:junos:15.1x49
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cpe:2.3:o:juniper:junos:16.1
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cpe:2.3:o:juniper:junos:17.3
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cpe:2.3:o:juniper:junos:17.4
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cpe:2.3:o:juniper:junos:18.1
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cpe:2.3:o:juniper:junos:18.2
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cpe:2.3:o:juniper:junos:18.3
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cpe:2.3:o:juniper:junos:18.4
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cpe:2.3:o:juniper:junos:19.1
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cpe:2.3:o:juniper:junos:19.2
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cpe:2.3:o:juniper:junos:19.3
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cpe:2.3:o:juniper:junos:19.4
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cpe:2.3:o:juniper:junos:20.1
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cpe:2.3:o:juniper:junos:20.2