CVE-2021-0268 Information

Description

An Improper Neutralization of CRLF Sequences in HTTP Headers (‘HTTP Response Splitting’) weakness in J-web of Juniper Networks Junos OS leads to buffer overflows segment faults or other impacts which allows an attacker to modify the integrity of the device and exfiltration information from the device without authentication. The weakness can be exploited to facilitate cross-site scripting (XSS) cookie manipulation (modifying session cookies stealing cookies) and more. This weakness can also be exploited by directing a user to a seemingly legitimate link from the affected site. The attacker requires no special access or permissions to the device to carry out such attacks. This issue affects: Juniper Networks Junos OS: 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4 18.3R3-S3; 18.4 versions prior to 18.4R2-S5 18.4R3-S3; 19.1 versions prior to 19.1R2-S2 19.1R3-S2; 19.2 versions prior to 19.2R1-S5 19.2R2; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R1-S3 19.4R2 19.4R3; 20.1 versions prior to 20.1R1-S2 20.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 18.1R1.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Reference

https://kb.juniper.net/JSA11159

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

9.3