Cross-site scripting in NuGetGallery

1) Cross-site scripting

EUVDB-ID: #VU28882

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1340

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker with permissions to upload packages could publish specially crafted content on a gallery page and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NuGetGallery: 2016.10 - 2019.06.24

CPE2.3

• cpe:2.3:a:microsoft:nugetgallery:2016.10:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:nugetgallery:2016.12:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:nugetgallery:2017.01:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1340
http://github.com/NuGet/NuGetGallery/releases/tag/v2020.06.09

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.