title: Junos OS: Session fixation vulnerability in J-Web
description: A session fixation vulnerability in J-Web on Junos OS may allow an attacker to use social engineering techniques to fix and hijack a J-Web administrators web session and potentially gain administrative access to the device. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15 on EX Series; 12.3X48 versions prior to 12.3X48-D85 on SRX Series; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1F6-S13, 15.1R7-S5; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238; 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R3-S1; 17.2 versions prior to 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S5; 17.4 versions prior to 17.4R2-S8, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3; 18.3 versions prior to 18.3R3; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R1-S2, 19.1R2.
problem types: CWE-384 Session Fixation
affected:
{
platforms: EX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.3R12-S15, status: affected, version: 12.3, versionType: custom
}
{
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.3X48-D85, status: affected, version: 12.3X48, versionType: custom
lessThan: 15.1X49-D180, status: affected, version: 15.1X49, versionType: custom
}
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 14.1X53-D51, status: affected, version: 14.1X53, versionType: custom
lessThan: 15.1F6-S13, 15.1R7-S5, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X53-D238, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R4-S13, 16.1R7-S5, status: affected, version: 16.1, versionType: custom
lessThan: 16.2R2-S10, status: affected, version: 16.2, versionType: custom
lessThan: 17.1R3-S1, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R2-S8, 17.2R3-S3, status: affected, version: 17.2, versionType: custom
lessThan: 17.3R3-S5, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R2-S8, 17.4R3, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S8, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R3, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R3, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R2, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R1-S2, 19.1R2, status: affected, version: 19.1, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
version: 3.1
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: 12.3R12-S15*, 12.3X48-D85, 14.1X53-D51, 15.1F6-S13, 15.1R7-S5, 15.1X49-D180, 15.1X53-D238, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10, 17.1R3-S1, 17.2R2-S8, 17.2R3-S3, 17.3R3-S5, 17.4R2-S8, 17.4R3*, 18.1R3-S8*, 18.2R3, 18.3R3, 18.4R2, 19.1R1-S2, 19.1R2, 19.2R1, and all subsequent releases.
*pending publication
workarounds: Use access control lists or firewall filters to limit access to Junos J-Web interface to only trusted users and networks to reduce risks of exploitation of this vulnerability.
Using common BCPs of safe web browsing such as not clicking on links in email or other media would reduce risks of exploitation of this vulnerability.
Disabling J-Web would completely prevent any exploitation of this issue.