CVE-2011-4408

high

Description

The Single Sign On Client (ubuntu-sso-client) for Ubuntu 11.04 and 11.10 does not properly validate SSL certificates when using HTTPS, which allows remote attackers to spoof a server and modify or read sensitive data via a man-in-the-middle (MITM) attack.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/76112

https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-4337

http://www.ubuntu.com/usn/USN-1464-1

http://www.securityfocus.com/bid/53829

http://secunia.com/advisories/49448

http://osvdb.org/82747

Details

Source: Mitre, NVD

Published: 2012-06-16

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.4

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.01229