{"id":"USN-2673-1","summary":"thunderbird vulnerabilities","details":"Karthikeyan Bhargavan discovered that NSS incorrectly handled state\ntransitions for the TLS state machine. If a remote attacker were able to\nperform a machine-in-the-middle attack, this flaw could be exploited to skip\nthe ServerKeyExchange message and remove the forward-secrecy property.\n(CVE-2015-2721)\n\nBob Clary, Christian Holler, Bobby Holley, and Andrew McCreight discovered\nmultiple memory safety issues in Thunderbird. If a user were tricked in to\nopening a specially crafted website in a browsing context, an attacker\ncould potentially exploit these to cause a denial of service via\napplication crash, or execute arbitrary code with the privileges of the\nuser invoking Thunderbird. (CVE-2015-2724)\n\nRonald Crane discovered multiple security vulnerabilities. If a user were\ntricked in to opening a specially crafted website in a browsing context,\nan attacker could potentially exploit these to cause a denial of service\nvia application crash, or execute arbitrary code with the privileges of\nthe user invoking Thunderbird. (CVE-2015-2734, CVE-2015-2735,\nCVE-2015-2736, CVE-2015-2737, CVE-2015-2738, CVE-2015-2739, CVE-2015-2740)\n\nMatthew Green discovered a DHE key processing issue in NSS where a MITM\ncould force a server to downgrade TLS connections to 512-bit export-grade\ncryptography. An attacker could potentially exploit this to impersonate\nthe server. (CVE-2015-4000)\n","modified":"2026-04-22T09:14:47.230258Z","published":"2015-07-20T22:04:24Z","related":["UBUNTU-CVE-2015-2721","UBUNTU-CVE-2015-2724","UBUNTU-CVE-2015-2730","UBUNTU-CVE-2015-2734","UBUNTU-CVE-2015-2735","UBUNTU-CVE-2015-2736","UBUNTU-CVE-2015-2737","UBUNTU-CVE-2015-2738","UBUNTU-CVE-2015-2739","UBUNTU-CVE-2015-2740","UBUNTU-CVE-2015-4000"],"upstream":["CVE-2015-2721","CVE-2015-2724","CVE-2015-2734","CVE-2015-2735","CVE-2015-2736","CVE-2015-2737","CVE-2015-2738","CVE-2015-2739","CVE-2015-2740","CVE-2015-4000","UBUNTU-CVE-2015-2721","UBUNTU-CVE-2015-2724","UBUNTU-CVE-2015-2734","UBUNTU-CVE-2015-2735","UBUNTU-CVE-2015-2736","UBUNTU-CVE-2015-2737","UBUNTU-CVE-2015-2738","UBUNTU-CVE-2015-2739","UBUNTU-CVE-2015-2740","UBUNTU-CVE-2015-4000"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2673-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2721"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2724"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2734"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2735"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2736"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2737"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2738"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2739"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-2740"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-4000"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/thunderbird@1:31.8.0+build1-0ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:31.8.0+build1-0ubuntu0.14.04.1"}]}],"versions":["1:24.0+build1-0ubuntu1","1:24.0+build1-0ubuntu2","1:24.1.1+build1-0ubuntu0.13.10.1","1:24.1.1+build1-0ubuntu1","1:24.2.0+build1-0ubuntu1","1:24.4.0+build1-0ubuntu1","1:24.5.0+build1-0ubuntu0.14.04.1","1:24.6.0+build1-0ubuntu0.14.04.1","1:31.0+build1-0ubuntu0.14.04.1","1:31.1.1+build1-0ubuntu0.14.04.1","1:31.1.2+build1-0ubuntu0.14.04.1","1:31.2.0+build2-0ubuntu0.14.04.1","1:31.3.0+build1-0ubuntu0.14.04.1","1:31.4.0+build1-0ubuntu0.14.04.1","1:31.5.0+build1-0ubuntu0.14.04.1","1:31.6.0+build1-0ubuntu0.14.04.1","1:31.7.0+build1-0ubuntu0.14.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"thunderbird"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"thunderbird-globalmenu"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"thunderbird-gnome-support"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"thunderbird-mozsymbols"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"thunderbird-testsuite"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"xul-ext-calendar-timezones"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"xul-ext-gdata-provider"},{"binary_version":"1:31.8.0+build1-0ubuntu0.14.04.1","binary_name":"xul-ext-lightning"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-2673-1.json","cves_map":{"cves":[{"id":"CVE-2015-2721","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2724","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2734","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2735","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2736","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2737","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2738","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2739","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-2740","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2015-4000","severity":[{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:14.04:LTS"}}}],"schema_version":"1.7.5"}