Server-Side Request Forgery (SSRF) in Uppy file uploader for web browsers

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU25824

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-8135

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the "downloadURL" function in "get" endpoint. 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Uppy: 1.0.0 - 1.9.2

CPE2.3

• cpe:2.3:a:transloadit:uppy:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:transloadit:uppy:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:transloadit:uppy:1.0.2:*:*:*:*:*:*:*

External links

https://snyk.io/vuln/SNYK-JS-UPPY-559068
https://github.com/transloadit/uppy/commit/d98384989fd00d955a7de1504d48433357a3b2e5
https://github.com/transloadit/uppy/pull/2083
https://hackerone.com/reports/786956
https://gist.github.com/netcode/1c8c28943f82ed24f77773c28f031168

Q & A

Can this vulnerability be exploited remotely?

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

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.