{"schemaVersion":3,"id":"USN-2743-3","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"unity-firefox-extension, webapps-greasemonkey, webaccounts-browser-extension update\n\nUSN-2743-1 fixed vulnerabilities in Firefox. Future Firefox updates will\nrequire all addons be signed and unity-firefox-extension, webapps-greasemonkey\nand webaccounts-browser-extension will not go through the signing process.\nBecause these addons currently break search engine installations (LP:\n#1069793), this update permanently disables the addons by removing them from\nthe system.\n\nWe apologize for any inconvenience.\n\nOriginal advisory details:\n\n Andrew Osmond, Olli Pettay, Andrew Sutherland, Christian Holler, David\n Major, Andrew McCreight, Cameron McCormack, Bob Clary and Randell Jesup\n discovered multiple memory safety issues in Firefox. If a user were\n tricked in to opening a specially crafted website, an attacker could\n potentially exploit these to cause a denial of service via application\n crash, or execute arbitrary code with the privileges of the user invoking\n Firefox. (CVE-2015-4500, CVE-2015-4501)\n\n André Bargull discovered that when a web page creates a scripted proxy\n for the window with a handler defined a certain way, a reference to the\n inner window will be passed, rather than that of the outer window.\n (CVE-2015-4502)\n\n Felix Gröbert discovered an out-of-bounds read in the QCMS color\n management library in some circumstances. If a user were tricked in to\n opening a specially crafted website, an attacker could potentially exploit\n this to cause a denial of service via application crash, or obtain\n sensitive information. (CVE-2015-4504)\n\n Khalil Zhani discovered a buffer overflow when parsing VP9 content in some\n circumstances. If a user were tricked in to opening a specially crafted\n website, an attacker could potentially exploit this to cause a denial of\n service via application crash, or execute arbitrary code with the\n privileges of the user invoking Firefox. (CVE-2015-4506)\n\n Spandan Veggalam discovered a crash while using the debugger API in some\n circumstances. If a user were tricked in to opening a specially crafted\n website whilst using the debugger, an attacker could potentially exploit\n this to execute arbitrary code with the privileges of the user invoking\n Firefox. (CVE-2015-4507)\n\n Juho Nurminen discovered that the URL bar could display the wrong URL in\n reader mode in some circumstances. If a user were tricked in to opening a\n specially crafted website, an attacker could potentially exploit this to\n conduct URL spoofing attacks. (CVE-2015-4508)\n\n A use-after-free was discovered when manipulating HTML media content in\n some circumstances. If a user were tricked in to opening a specially\n crafted website, an attacker could potentially exploit this to cause a\n denial of service via application crash, or execute arbitrary code with\n the privileges of the user invoking Firefox. (CVE-2015-4509)\n\n Looben Yang discovered a use-after-free when using a shared worker with\n IndexedDB in some circumstances. If a user were tricked in to opening a\n specially crafted website, an attacker could potentially exploit this to\n cause a denial of service via application crash, or execute arbitrary code\n with the privileges of the user invoking Firefox. (CVE-2015-4510)\n\n Francisco Alonso discovered an out-of-bounds read during 2D canvas\n rendering in some circumstances. If a user were tricked in to opening a\n specially crafted website, an attacker could potentially exploit this to\n obtain sensitive information. (CVE-2015-4512)\n\n Jeff Walden discovered that changes could be made to immutable properties\n in some circumstances. If a user were tricked in to opening a specially\n crafted website, an attacker could potentially exploit this to execute\n arbitrary script in a privileged scope. (CVE-2015-4516)\n\n Ronald Crane reported multiple vulnerabilities. If a user were tricked in\n to opening a specially crafted website, an attacker could potentially\n exploit these to cause a denial of service via application crash, or\n execute arbitrary code with the privileges of the user invoking Firefox.\n (CVE-2015-4517, CVE-2015-4521, CVE-2015-4522, CVE-2015-7174,\n CVE-2015-7175, CVE-2015-7176, CVE-2015-7177, CVE-2015-7180)\n\n Mario Gomes discovered that dragging and dropping an image after a\n redirect exposes the redirected URL to scripts. An attacker could\n potentially exploit this to obtain sensitive information. (CVE-2015-4519)\n\n Ehsan Akhgari discovered 2 issues with CORS preflight requests. An\n attacker could potentially exploit these to bypass CORS restrictions.\n (CVE-2015-4520)","dates":{"published":"2015-09-24T16:31:43.000Z","modified":"2026-02-10T04:40:55.000Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"unity-firefox-extension","name":"unity-firefox-extension","label":"unity-firefox-extension","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/unity-firefox-extension","purlType":"deb","versions":[{"text":"< 3.0.0+14.04.20140416-0ubuntu1.14.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.0.0+14.04.20140416-0ubuntu1.14.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"webaccounts-browser-extension","name":"webaccounts-browser-extension","label":"webaccounts-browser-extension","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/webaccounts-browser-extension","purlType":"deb","versions":[{"text":"< 0.5-0ubuntu2.14.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.5-0ubuntu2.14.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"webapps-greasemonkey","name":"webapps-greasemonkey","label":"webapps-greasemonkey","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/webapps-greasemonkey","purlType":"deb","versions":[{"text":"< 2.3.6+13.10.20130920.1-0ubuntu1.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.3.6+13.10.20130920.1-0ubuntu1.2","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-2743-3","label":"ubuntu.com/security/notices/USN-2743-3","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://launchpad.net/bugs/1069793","label":"launchpad.net/bugs/1069793","hostname":"launchpad.net","tags":["REPORT"]},{"url":"https://launchpad.net/bugs/1498681","label":"launchpad.net/bugs/1498681","hostname":"launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2013-1054","CVE-2013-1055"]},"timeline":[{"kind":"published","date":"2015-09-24T16:31:43.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:40:55.000Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T06:50:47.167Z","stale":false,"partial":false}}