Information disclosure in Eclipse Jetty



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-28169
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Jetty
Server applications / Web servers

Vendor Eclipse

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU53973

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28169

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to a double decoding issue when parsing URI with certain characters. A remote attacker can send requests to the ConcatServlet and WelcomeFilter and view contents of protected resources within the WEB-INF directory.

Example:

/concat?/%2557EB-INF/web.xml

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Jetty: 9.0.0.v20130308 - 11.0.2

CPE2.3 External links

https://github.com/eclipse/jetty.project/security/advisories/GHSA-gwcr-j4wh-j3cq
https://bugs.eclipse.org/bugs/show_bug.cgi?id=573389


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.



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