{"id":"CVE-2021-34337","aliases":["DEBIAN-CVE-2021-34337","EUVD-2023-0129","GHSA-2jg5-xgvv-4wq7","OESA-2022-2005","PYSEC-2023-22","UBUNTU-CVE-2021-34337","openSUSE-SU-2024:11644-1","openSUSE-SU-2024:11760-1"],"status":"published","title":"Mailman Core vulnerable to timing attacks","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","severity":{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00299,"percentile":0.22911,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-208"],"published":"2022-10-21T11:05:19Z","modified":"2026-10-23T18:03:49Z","fixes":[{"ecosystem":"PyPI","package":"mailman","fixed_in":["3.3.5"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"mailman3","fixed_in":["3.3.7-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mailman3","fixed_in":["3.3.7-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mailman3","fixed_in":["3.3.7-1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS","package":"mailman","fixed_in":["3.3.2-5.oe2203"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"python3-mailman","fixed_in":["3.3.5-1.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"mailman3","fixed_in":["3.3.5-2.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"mailman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.7-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.7-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.7-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"mailman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5"}]}],"versions":["3.0.0","3.0.0a1","3.0.0a2","3.0.0a3","3.0.0a4","3.0.0a5","3.0.0a6","3.0.0a7","3.0.0a8","3.0.0b1","3.0.0b2","3.0.0b3","3.0.0b3-","3.0.0b4","3.0.0b5","3.0.1","3.0.2","3.0.3","3.0rc1","3.1.0","3.1.0b1","3.1.0b2","3.1.0b3","3.1.0b4","3.1.0b5","3.1.0rc1","3.1.0rc2","3.1.1","3.2.0","3.2.1","3.2.1rc1","3.2.2","3.3.0","3.3.1","3.3.1rc1","3.3.2","3.3.2rc1","3.3.2rc2","3.3.3","3.3.3rc1","3.3.4","3.3.5b1","3.3.5rc1"]},{"source":"osv","ecosystem":"openEuler:22.03-LTS","package":"mailman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.2-5.oe2203"}]}]},{"source":"osv","ecosystem":"PyPI","package":"mailman","ranges":[{"type":"GIT","events":[{"introduced":"0"},{"fixed":"e4a39488c4510fcad8851217f10e7337a196bb51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5"}]}],"versions":["3.0.0","3.0.0a1","3.0.0a2","3.0.0a3","3.0.0a4","3.0.0a5","3.0.0a6","3.0.0a7","3.0.0a8","3.0.0b1","3.0.0b2","3.0.0b3","3.0.0b3-","3.0.0b4","3.0.0b5","3.0.1","3.0.2","3.0.3","3.0rc1","3.1.0","3.1.0b1","3.1.0b2","3.1.0b3","3.1.0b4","3.1.0b5","3.1.0rc1","3.1.0rc2","3.1.1","3.2.0","3.2.1","3.2.1rc1","3.2.2","3.3.0","3.3.1","3.3.1rc1","3.3.2","3.3.2rc1","3.3.2rc2","3.3.3","3.3.3rc1","3.3.4","3.3.5b1","3.3.5rc1","3.1.0.b4","3.0","3.0b5-A","3.0b5","3.0b4","3.0b3","3.0b2","3.0b1","3.0a8","3.0a7","3.0a6","3.0a5","3.0a4","3.0a3","3.0a2","3.0a1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1-7","3.1.1-8","3.1.1-9"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1-1","3.2.2-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python3-mailman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5-1.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"mailman3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5-2.1"}]}]}],"products":[{"vendor":"gnu","product":"mailman"}],"references":[{"url":"https://gitlab.com/mailman/mailman/-/issues/911","tags":["x_transferred","Broken Link","report","web"]},{"url":"https://gitlab.com/mailman/mailman/-/tags","tags":["x_transferred","Release Notes","advisory","web"]},{"url":"https://gitlab.com/mailman/mailman/-/commit/e4a39488c4510fcad8851217f10e7337a196bb51","tags":["x_transferred","Patch","Vendor Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34337","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/mailman/PYSEC-2023-22.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2jg5-xgvv-4wq7","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-34337","tags":["advisory"]},{"url":"https://gitlab.com/mailman/mailman","tags":["package"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-2005","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-34337","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-34337","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34337","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-34337","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T00:00:00Z","modified":"2025-02-06T16:13:25.426Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2023-0129","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T00:00:00Z","modified":"2025-02-06T16:13:25Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:03.312509Z"}],"ghsa":[{"id":"GHSA-2jg5-xgvv-4wq7","title":"Mailman Core vulnerable to timing attacks","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T21:30:16Z","modified":"2024-09-30T16:52:43Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:38:06.988799Z"}],"nvd":[{"id":"CVE-2021-34337","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T20:16:00.623Z","modified":"2026-06-17T03:55:40.843Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary"},{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"CVE-2021-34337","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T20:16:00.623Z","modified":"2026-10-20T10:54:47.800690945Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.13324Z"},{"id":"DEBIAN-CVE-2021-34337","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T20:16:00.623Z","modified":"2026-10-23T18:03:49.960589853Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"GHSA-2jg5-xgvv-4wq7","title":"Mailman Core vulnerable to timing attacks","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T21:30:16Z","modified":"2026-02-22T22:56:10.942103Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"},{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:46:34.338541Z"},{"id":"OESA-2022-2005","title":"mailman security update","description":"This is GNU Mailman, a mailing list management system distributed under the terms of the GNU General Public License (GPL) version 3 or later.  The name of this software is spelled 'Mailman' with a leading capital 'M' but with a lower case second `m'.  Any other spelling is incorrect. Security Fix(es):\r\n\r\nCheck the REST API password in a way that is resistant to timing attacks. Using basic string equality is vulnerable to timing attacks as it will short circuit at the first wrong character. Using hmac.compare_digest avoids that issue and will take the same time, regardless of whether the value is correct or not. This is only exploitable if an attacker can talk directly to the REST API, which by default is bound to localhost.\r\n\r\nReference:\r\n\r\nhttps://bugs.gentoo.org/828115(CVE-2021-34337)","status":"published","published":"2022-10-21T11:05:19Z","modified":"2026-08-18T01:17:20.156996729Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:39.934788Z"},{"id":"UBUNTU-CVE-2021-34337","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T20:16:00Z","modified":"2025-10-24T04:50:24Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"},{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"},{"id":"openSUSE-SU-2024:11644-1","title":"python3-mailman-3.3.5-1.1 on GA media","description":"These are all security issues fixed in the python3-mailman-3.3.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:20:47.5929Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"openSUSE-SU-2024:11760-1","title":"mailman3-3.3.5-2.1 on GA media","description":"These are all security issues fixed in the mailman3-3.3.5-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:41:00.05867Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"PYSEC-2023-22","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","status":"published","published":"2023-04-15T20:16:00Z","modified":"2026-06-10T17:00:42.208843999Z","updated_at":"2026-11-02T15:52:53.837392Z"}]}}