#VU53725 Improper Privilege Management in Lasso - CVE-2021-28091

Vulnerability identifier: #VU53725

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-28091

CWE-ID: CWE-269

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Lasso
Universal components / Libraries / Libraries used by multiple products

Vendor: Entrouvert

Description

The vulnerability allows an attacker to impersonate other users.

The vulnerability exists due to improper privilege management within Lasso SAML implementation. A remote authenticated user can impersonate other authorized application users while interacting with the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Lasso: 0.2.0 - 2.6.1

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External links
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0

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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. However, proof of concept for this vulnerability is available.