Server-Side Request Forgery (SSRF) in Gitea - CVE-2020-28991
Published: November 24, 2020 / Updated: November 27, 2020
Vulnerability identifier: #VU48686
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-28991
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Gitea
Gitea
Software vendor:
The Gitea Authors
The Gitea Authors
Description
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within the in ParseRemoteAddr() function in "modules/auth/repo_form.go". The application accepts "git" protocol along with a custom TCP port number and new lines within an encoded URL. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Remediation
Install updates from vendor's website.