{"cve":{"cve_id":"CVE-2011-0721","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02309,"epss_percentile":0.81129,"epss_as_of":"2026-06-23","description":"Multiple CRLF injection vulnerabilities in (1) chfn and (2) chsh in shadow 1:4.1.4 allow local users to add new users or groups to /etc/passwd via the GECOS field.","published_at":"2011-02-18T23:00:00Z","last_modified_at":"2026-06-16T23:27:56.927000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-20"],"nvd_references":["http://www.vupen.com/english/advisories/2011/0398","http://www.vupen.com/english/advisories/2011/0773","http://secunia.com/advisories/43345","http://www.debian.org/security/2011/dsa-2164","http://www.ubuntu.com/usn/USN-1065-1","http://www.vupen.com/english/advisories/2011/0396","https://exchange.xforce.ibmcloud.com/vulnerabilities/65564","http://osvdb.org/70895","http://www.securityfocus.com/bid/46426","http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.380014","http://secunia.com/advisories/42505"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:05:46.816901Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"debian","vendor_name":"Debian","product_slug":"shadow","product_name":"shadow","version_start":"1:4.1.4","version_start_inclusive":true,"version_end":"1:4.1.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:debian:shadow:1\\:4.1.4:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://www.vupen.com/english/advisories/2011/0398","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.vupen.com/english/advisories/2011/0773","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://secunia.com/advisories/43345","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.debian.org/security/2011/dsa-2164","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1065-1","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.vupen.com/english/advisories/2011/0396","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/65564","source_type":"MISC","tags":[]},{"url":"http://osvdb.org/70895","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/46426","source_type":"MISC","tags":[]},{"url":"http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.380014","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/42505","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2011-02-18T23:00:00Z","label":"CVE published","source":null}]}