{"id":"CVE-2020-11728","aliases":["DEBIAN-CVE-2020-11728","DLA-2178-1","DSA-4660-1","EUVD-2020-4070","GHSA-gqhq-jmhf-8j84","UBUNTU-CVE-2020-11728","USN-4539-1"],"status":"published","title":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management...","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01588,"percentile":0.75823,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-384"],"published":"2020-04-15T15:37:12Z","modified":"2026-10-26T12:01:23Z","fixes":[{"ecosystem":"Debian:12","package":"awl","fixed_in":["0.61-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"awl","fixed_in":["0.61-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"awl","fixed_in":["0.61-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"awl","fixed_in":["0.60-1+deb10u1ubuntu1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.61-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.61-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.61-1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.55-1+deb8u1"}]}],"versions":["0.55-1"],"bundled":2},{"source":"osv","ecosystem":"Debian:9","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.57-1+deb9u1"}]}],"versions":["0.57-1"],"bundled":2},{"source":"osv","ecosystem":"Debian:10","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.60-1+deb10u1"}]}],"versions":["0.60-1","0.60-1+deb10u1~bpo9+1"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.55-1","0.56-1","0.56-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.57-1","0.58-1","0.59-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.60-1+deb10u1ubuntu1"}]}],"versions":["0.60-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"awl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.60-1+deb10u1ubuntu1"}]}],"versions":["0.60-1"]}],"products":[{"vendor":"davical","product":"andrew\\'s_web_libraries"},{"vendor":"debian","product":"debian_linux"}],"references":[{"url":"https://gitlab.com/davical-project/awl/-/issues/19","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=956650","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/04/msg00011.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://www.debian.org/security/2020/dsa-4660","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"https://usn.ubuntu.com/4539-1/","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11728"},{"url":"https://usn.ubuntu.com/4539-1"},{"url":"https://github.com/advisories/GHSA-gqhq-jmhf-8j84"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-11728","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-11728","tags":["report"]},{"url":"https://gitlab.com/davical-project/awl/-/commit/c2e808cc2420f8d870ac0a4aa9cc1f2c90562428","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4539-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11728","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-11728","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T15:37:12Z","modified":"2024-08-04T11:41:59.965Z","updated_at":"2026-11-02T14:35:57.67317Z"}],"euvd":[{"id":"EUVD-2020-4070","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T15:37:12Z","modified":"2024-08-04T11:41:59Z","updated_at":"2026-11-03T03:07:42.412087Z"}],"ghsa":[{"id":"GHSA-gqhq-jmhf-8j84","title":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management...","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2022-05-24T17:14:41Z","modified":"2024-04-04T02:49:53Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:56:12.154453Z"}],"nvd":[{"id":"CVE-2020-11728","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T16:15:16.643Z","modified":"2026-06-17T02:50:41.75Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:05:59.125695Z"}],"osv":[{"id":"CVE-2020-11728","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T16:15:16.643Z","modified":"2026-10-20T10:51:17.20837692Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:14.034736Z"},{"id":"DEBIAN-CVE-2020-11728","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T16:15:16.643Z","modified":"2026-10-26T12:01:23.152631252Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"UBUNTU-CVE-2020-11728","description":"An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.","status":"published","published":"2020-04-15T16:15:00Z","modified":"2026-02-04T04:16:19.96071Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:22.212782Z"},{"id":"DLA-2178-1","title":"awl - security update","status":"published","published":"2020-04-18T00:00:00Z","modified":"2026-03-09T01:18:51.256581Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"DSA-4660-1","title":"awl - security update","status":"published","published":"2020-04-21T00:00:00Z","modified":"2026-03-09T02:09:26.083747Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"USN-4539-1","title":"awl vulnerability","description":"Andrew Bartlett discovered that DAViCal Andrew's Web Libraries (AWL) did\nnot properly manage session keys. An attacker could possibly use this\nissue to impersonate a session. (CVE-2020-11728)\n","status":"published","published":"2020-09-24T18:18:05Z","modified":"2026-04-27T15:42:40.937Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}