{"cve":"CVE-2011-4408","nvd":{"published":"2012-06-16T00:55:05.547","modified":"2026-06-16T23:34:52.883","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://osvdb.org/82747","http://secunia.com/advisories/49448","http://www.securityfocus.com/bid/53829","http://www.ubuntu.com/usn/USN-1464-1","https://exchange.xforce.ibmcloud.com/vulnerabilities/76112"],"products":["canonical:ubuntu_linux"],"source":"nvd","synced_at":"2026-10-19T20:24:00.973572543+00:00"},"epss":{"cve":"CVE-2011-4408","score":0.01229,"percentile":0.68913,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}