Stored cross-site scripting in Juniper Networks Junos OS

1) Stored cross-site scripting

EUVDB-ID: #VU57440

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31355

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the captive portal graphical user interface. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3x48 - 21.1R1-S1

CPE2.3

• cpe:2.3:o:juniper_networks:juniper_junos_os:12.3X48-D101:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:15.1X49-D211:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:15.1X49-D210:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.3R3-S4:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.3R3-S1:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.3R2-S3:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.4R3-S8:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.4R2-S3:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:18.4R1-S5:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.1R3-S6:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.1R1-S4:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.2R3-S2:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.2R1-S4:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.3R2-S7:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.3R3-S3:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.3R1-S1:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.4R3-S5:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:19.4R1-S4:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.1R2-S2:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.2R1:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.3R1-S2:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.4R1-S1:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:21.1R1-S1:*:*:*:*:*:*:*

External links

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11220&cat=SIRT_1&actp=LIST

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.