Stored cross-site scripting in monit (Alpine package)

1) Stored cross-site scripting

EUVDB-ID: #VU18412

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11454

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. The vulnerability allows a remote authenticated attacker to inject arbitrary JavaScript via  user field of the Authorization header for HTTP Basic Authentication and execute it during an "_viewlog" operation.

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 update from vendor's website.

Vulnerable software versions

monit (Alpine package): 5.24.0-r1 - 5.25.1-r1

External links

http://git.alpinelinux.org/aports/commit/?id=165df433b6fd3e30ce578c4f54946a2079aa963c
http://git.alpinelinux.org/aports/commit/?id=8ae19acb1269f568cc856f52a50234227872b0bd
http://git.alpinelinux.org/aports/commit/?id=b3c4cba85e047ff7101bb58a0acf2a266f0d3f34

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.