CVE-2019-0039

Junos OS: Login credentials are vulnerable to brute force attacks through the REST API

HIGH

8.1

CVSS Score

Published: April 10, 2019 at 08:13 PM UTC

Updated: June 17, 2026 at 02:07 AM UTC

1 product affected across 1 vendorJunos

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Severity

HIGH8.1

Exploit prediction

EPSS 1%

Description

If REST API is enabled, the Junos OS login credentials are vulnerable to brute force attacks. The high default connection limit of the REST API may allow an attacker to brute-force passwords using advanced scripting techniques. Additionally, administrators who do not enforce a strong password policy can increase the likelihood of success from brute force attacks. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3; 16.1X65 versions prior to 16.1X65-D49; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R1-S6, 17.4R2-S2; 18.1 versions prior to 18.1R2-S4, 18.1R3-S1; 18.2 versions prior to 18.2R1-S5; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

14.1X53 ≤ v < 14.1X53-D4914.1x53 ≤ v < 14.1x53-d4915.1 ≤ v < 15.1F6-S12, 15.1R7-S315.1 ≤ v < 15.1f6-s1215.1X49 ≤ v < 15.1X49-D16015.1X53 ≤ v < 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D6915.1x49 ≤ v < 15.1x49-d16015.1x53 ≤ v < 15.1x53-d23616.1 ≤ v < 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S316.1 ≤ v < 16.1r3-s1016.1X65 ≤ v < 16.1X65-D4916.1x65 ≤ v < 16.1x65-d4916.2 ≤ v < 16.2R2-S716.2 ≤ v < 16.2r2-s717.1 ≤ v < 17.1R2-S10, 17.1R317.1 ≤ v < 17.1r2-s1017.2 ≤ v < 17.2R1-S8, 17.2R3-S117.2 ≤ v < 17.2r1-s817.3 ≤ v < 17.3R3-S217.3 ≤ v < 17.3r3-s217.4 ≤ v < 17.4R1-S6, 17.4R2-S217.4 ≤ v < 17.4r1-s618.1 ≤ v < 18.1R2-S4, 18.1R3-S118.1 ≤ v < 18.1r2-s418.2 ≤ v < 18.2R1-S518.2 ≤ v < 18.2r1-s518.2X75 ≤ v < 18.2X75-D3018.2x75 ≤ v < 18.2x75-d3018.3 ≤ v < 18.3R1-S118.3 ≤ v < 18.3r1-s114.1X53 15.1 15.1X49 15.1X53 16.1 16.1X65 16.2 17.1 17.2 17.3 17.4 18.1 18.2 18.2X75 18.3

Affected range stops below 14.1x53-d49, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1F6-S12, 15.1R7-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1f6-s12, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1x49-d160, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1x53-d236, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1r3-s10, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1x65-d49, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.2r2-s7, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R2-S10, 17.1R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1r2-s10, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2R1-S8, 17.2R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2r1-s8, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.3r3-s2, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R1-S6, 17.4R2-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4r1-s6, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R2-S4, 18.1R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1r2-s4, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2r1-s5, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2x75-d30, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3r1-s1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA10928

References (2)

VDB Entryx_refsource_BIDBroken LinkThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/107899

x_refsource_CONFIRMMitigationVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA10928

CVSS

8.1HIGH[email protected]

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-307

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