Path traversal in Juniper Junos OS



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1631
CWE-ID CWE-22
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
 Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Path traversal

EUVDB-ID: #VU27430

Risk: Medium

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2020-1631

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the HTTP/HTTPS service used by J-Web. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Note: Using this vulnerability, an attacker may be able to inject commands into the httpd.log, read files with "world" readable file permission or obtain J-Web session tokens.  

Mitigation

Vendor recommends to update to the following fixed releases available for customer download: 12.3X48-D101, 15.1X49-D211, 18.2R3-S4, 18.4R3-S2, and 20.1R1-S1, the remaining fixed releases will be available in future time.

Vulnerable software versions

Juniper Junos OS: 12.3X48-D10 - 20.1

CPE2.3 External links

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11021&cat=SIRT_1&actp=LIST


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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