{"id":"CVE-2020-9760","aliases":["DEBIAN-CVE-2020-9760","DLA-2157-1","DLA-2770-1","EUVD-2020-30539","GHSA-v7rw-j9c8-92qq","MGASA-2020-0153","UBUNTU-CVE-2020-9760","USN-5258-1"],"status":"published","title":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC...","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.02101,"percentile":0.81961,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2020-03-23T15:39:49Z","modified":"2026-10-26T12:02:30Z","fixes":[{"ecosystem":"Debian:12","package":"weechat","fixed_in":["2.7.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"weechat","fixed_in":["2.7.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"weechat","fixed_in":["2.7.1-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"weechat","fixed_in":["1.4-2ubuntu0.1+esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"weechat","fixed_in":["1.9.1-1ubuntu1+esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1-1+deb8u3"}]}],"versions":["1.0.1-1","1.0.1-1+deb8u1","1.0.1-1+deb8u1~bpo70+1","1.0.1-1+deb8u2"],"bundled":3},{"source":"osv","ecosystem":"Debian:9","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6-1+deb9u3"}]}],"versions":["1.6-1+deb9u1","1.6-1+deb9u2"],"bundled":4},{"source":"osv","ecosystem":"Mageia:7","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-1.mga7"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4-2ubuntu0.1+esm1"}]}],"versions":["1.3-1","1.3-1build1","1.4-1","1.4-1build1","1.4-1build2","1.4-2","1.4-2ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-1ubuntu1+esm1"}]}],"versions":["1.9.1-1","1.9.1-1build1","1.9.1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4-2ubuntu0.1+esm1"}]}],"versions":["1.3-1","1.3-1build1","1.4-1","1.4-1build1","1.4-1build2","1.4-2","1.4-2ubuntu0.1"],"bundled":5},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-1ubuntu1+esm1"}]}],"versions":["1.9.1-1","1.9.1-1build1","1.9.1-1ubuntu1"],"bundled":5},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"weechat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8-1ubuntu0.1~esm1"}]}],"versions":["2.6-2","2.6-2build1","2.6-2build2","2.6-2ubuntu1","2.6-2ubuntu2","2.8-1"],"bundled":5}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"weechat","product":"weechat"}],"references":[{"url":"https://weechat.org/doc/security/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://github.com/weechat/weechat/commit/40ccacb4330a64802b1f1e28ed9a6b6d3ca9197f","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/03/msg00031.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","report"]},{"url":"https://security.gentoo.org/glsa/202003-51","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00018.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9760"},{"url":"https://github.com/advisories/GHSA-v7rw-j9c8-92qq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-9760","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2020-0153.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=26400","tags":["report"]},{"url":"https://www.debian.org/lts/security/2020/dla-2157","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2020-9760","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-5258-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-9760","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-14727","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-8955","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-9759","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-40516","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-9760","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T15:39:49Z","modified":"2024-08-04T10:43:04.502Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2020-30539","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T15:39:49Z","modified":"2024-08-04T10:43:04Z","updated_at":"2026-11-03T03:07:53.06089Z"}],"ghsa":[{"id":"GHSA-v7rw-j9c8-92qq","title":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC...","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2022-05-24T17:12:18Z","modified":"2023-01-29T05:02:09Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:45:00.10333Z"}],"nvd":[{"id":"CVE-2020-9760","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T16:15:17.923Z","modified":"2026-06-17T03:28:31.863Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:05:56.580228Z"}],"osv":[{"id":"CVE-2020-9760","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T16:15:17.923Z","modified":"2026-10-20T14:15:08.38706345Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"DEBIAN-CVE-2020-9760","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T16:15:17.923Z","modified":"2026-10-26T12:02:30.632643724Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:34.311861Z"},{"id":"UBUNTU-CVE-2020-9760","description":"An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected). When a new IRC message 005 is received with longer nick prefixes, a buffer overflow and possibly a crash can happen when a new mode is set for a nick.","status":"published","published":"2020-03-23T16:15:00Z","modified":"2026-04-22T12:44:36.157021Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:25.728622Z"},{"id":"DLA-2157-1","title":"weechat - security update","status":"published","published":"2020-03-24T00:00:00Z","modified":"2026-03-09T01:22:57.870723Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"DLA-2770-1","title":"weechat - security update","status":"published","published":"2021-09-30T00:00:00Z","modified":"2026-03-09T01:23:00.127647Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"MGASA-2020-0153","title":"Updated weechat packages fix security vulnerabilities","description":"Updated weechat packages fix security vulnerabilities:\n\nAn issue was discovered in WeeChat before 2.7.1 (0.4.0 to 2.7 are\naffected). A malformed message 352 (who) can cause a NULL pointer\ndereference in the callback function, resulting in a crash\n(CVE-2020-9759).\n\nAn issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are\naffected). When a new IRC message 005 is received with longer nick\nprefixes, a buffer overflow and possibly a crash can happen when a \nnew mode is set for a nick (CVE-2020-9760).\n","status":"published","published":"2020-04-02T22:48:49Z","modified":"2026-04-16T04:41:26.976212319Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"USN-5258-1","title":"weechat vulnerabilities","description":"Stuart Nevans Locke discovered that WeeChat's relay plugin insecurely handled\nmalformed websocket frames. A remote attacker in control of a server\ncould possibly use this issue to cause denial of service in a client.\n(CVE-2021-40516)\n\nStuart Nevans Locke discovered that WeeChat insecurely handled certain\nIRC messages. A remote attacker in control of a server could possibly use\nthis issue to cause denial of service in a client. This issue only affected\nUbuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9760)\n\nStuart Nevans Locke discovered that WeeChat insecurely handled certain\nIRC messages. A remote unauthenticated attacker could possibly use these\nissues to cause denial of service in a client. These issues only affected\nUbuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2020-9759, CVE-2020-8955)\n\nJoseph Bisch discovered that WeeChat's logger incorrectly handled certain\nmemory operations when handling log file names. A remote attacker could possibly\nuse this issue to cause denial of service in a client. This issue only\naffected Ubuntu 16.04 ESM. (CVE-2017-14727)\n","status":"published","published":"2022-02-04T16:38:24Z","modified":"2026-06-25T13:31:00.16572369Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}