{"id":"CVE-2015-3220","aliases":["EUVD-2017-0135","GHSA-4749-p7rx-8jjj","PYSEC-2017-96"],"status":"published","title":"tlslite remote denial of service vulnerability","description":"The tlslite library before 0.4.9 for Python allows remote attackers to trigger a denial of service (runtime exception and process crash).","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03293,"percentile":0.88576,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2017-06-13T16:00:00Z","modified":"2026-06-17T00:25:33Z","fixes":[{"ecosystem":"PyPI","package":"tlslite","fixed_in":["0.4.9"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"tlslite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.9"}]}]},{"source":"osv","ecosystem":"PyPI","package":"tlslite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.9"}]}],"versions":["0.3.8","0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6","0.4.7","0.4.8"]},{"source":"osv","ecosystem":"PyPI","package":"tlslite","ranges":[{"type":"GIT","events":[{"introduced":"0"},{"fixed":"aca8d4f898b436ff6754e1a9ab96cae976c8a853"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.9"}]}],"versions":["0.3.8","0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6","0.4.7","0.4.8","v0.4.8","v0.4.3","v0.4.2","v0.4.1","v0.3.9x"]}],"products":[{"vendor":"tlslite_project","product":"tlslite"}],"references":[{"url":"https://groups.google.com/forum/#%21topic/tlslite-dev/MoWE7B0A4iU","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1254215","tags":["x_refsource_CONFIRM","x_transferred","Issue 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