Information disclosure in Boa Webserver



Published: 2021-05-31
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-33558
CWE-ID CWE-200
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		Boa Webserver
Server applications / Web servers

Vendor Larry Doolittle and Jon Nelson

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU53674

Risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-33558

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a misconfiguration involving backup.html, preview.html, js/log.js, log.html, email.html, online-users.html, and config.js. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Boa Webserver: 0.94.13

External links

http://github.com/mdanzaruddin/CVE-2021-33558.
http://sourceforge.net/projects/boa/files/boa/0.94.13/


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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