Path traversal in Juniper Junos OS - CVE-2021-31385
Published: January 17, 2022
Vulnerability identifier: #VU59635
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-31385
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Juniper Junos OS
Juniper Junos OS
Detailed vulnerability description
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in J-Web. A remote low-privileged user can send a specially crafted HTTP request and read arbitrary files on the system.
Successful vulnerability exploitation may allow an attacker to execute arbitrary code with root privileges.
How to mitigate CVE-2021-31385
Install update from vendor's website.