{"id":"CVE-2018-16839","aliases":["ALPINE-CVE-2018-16839","BELL-CVE-2018-16839","CURL-CVE-2018-16839","DEBIAN-CVE-2018-16839","DLA-1568-1","DSA-4331-1","EUVD-2018-8635","GHSA-g54v-fj63-pm34","SUSE-SU-2018:3624-1","SUSE-SU-2019:0339-1","SUSE-SU-2019:0996-1","UBUNTU-CVE-2018-16839","USN-3805-1","openSUSE-SU-2024:10582-1"],"status":"published","title":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication...","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","severity":{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.05782,"percentile":0.93147,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-122","CWE-190"],"published":"2018-10-31T00:00:00Z","modified":"2026-10-25T01:05:28Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.5","package":"curl","fixed_in":["7.61.1-r1"],"sources":["osv"]},{"ecosystem":"Alpine:v3.6","package":"curl","fixed_in":["7.61.1-r1"],"sources":["osv"]},{"ecosystem":"Alpine:v3.7","package":"curl","fixed_in":["7.61.1-r1"],"sources":["osv"]},{"ecosystem":"Alpine:v3.8","package":"curl","fixed_in":["7.61.1-r1"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"curl","fixed_in":["7.62.0-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"curl","fixed_in":["7.62.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"curl","fixed_in":["7.62.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"curl","fixed_in":["7.62.0-1"],"sources":["osv"]},{"ecosystem":"SUSE:OpenStack 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Advisory","advisory"]},{"url":"https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-16839"},{"url":"https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f@%3Cdevnull.infra.apache.org%3E"},{"url":"https://github.com/advisories/GHSA-g54v-fj63-pm34"},{"url":"https://security.alpinelinux.org/vuln/CVE-2018-16839","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2018-16839","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-16839","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2018/suse-su-20183624-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1112758","tags":["report"]},{"url":"https://bugzilla.suse.com/1113660","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-16839","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-16840","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-16842","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-20190339-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1113029","tags":["report"]},{"url":"https://bugzilla.suse.com/1123371","tags":["report"]},{"url":"https://bugzilla.suse.com/1123377","tags":["report"]},{"url":"https://bugzilla.suse.com/1123378","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-16890","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-3822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-3823","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-20190996-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1131886","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-16839","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3805-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-16839","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-16840","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-16842","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2006-1061","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9586","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9594","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000099","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000100","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000101","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000254","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000257","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-2629","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7468","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8816","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8817","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8818","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-9502","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0500","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000005","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000120","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000122","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000300","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000301","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-14618","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-15601","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-5435","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-5436","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-5481","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-5482","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8169","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8231","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8284","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8285","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8286","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22297","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22298","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22876","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22890","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22898","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22901","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22922","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22924","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22945","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22946","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-22947","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:00:00Z","modified":"2026-04-15T20:57:05.128Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-190","CWE-122"],"updated_at":"2026-11-02T14:35:11.072321Z"}],"euvd":[{"id":"EUVD-2018-8635","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:00:00Z","modified":"2026-04-15T20:57:05Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T19:24:24.796113Z"}],"ghsa":[{"id":"GHSA-g54v-fj63-pm34","title":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication...","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2022-05-13T01:34:07Z","modified":"2023-02-01T05:08:18Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:50:44.010322Z"}],"nvd":[{"id":"CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:29:00.23Z","modified":"2026-06-17T01:44:52.76Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.0","score":9.8,"vector":"CVSS:3.0/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-122","CWE-190","CWE-119"],"updated_at":"2026-11-02T14:04:47.196456Z"}],"osv":[{"id":"ALPINE-CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:29:00.23Z","modified":"2026-10-23T17:17:55.227611559Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:27:47.187336Z"},{"id":"BELL-CVE-2018-16839","title":"CVE-2018-16839 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:13:50.281573Z","modified":"2026-01-26T09:48:15.631239Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:14.701973Z"},{"id":"CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:29:00.23Z","modified":"2026-10-24T14:20:14.317636934Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:08.533609Z"},{"id":"DEBIAN-CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T18:29:00.23Z","modified":"2026-10-23T18:03:01.247088039Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"UBUNTU-CVE-2018-16839","description":"Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.","status":"published","published":"2018-10-31T00:00:00Z","modified":"2026-04-22T11:48:03.092651Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:17.496046Z"},{"id":"CURL-CVE-2018-16839","title":"SASL password overflow via integer overflow","description":"libcurl contains a buffer overrun in the SASL authentication code.\n\nThe internal function `Curl_auth_create_plain_message` fails to correctly\nverify that the passed in lengths for name and password are not too long, then\ncalculates a buffer size to allocate.\n\nOn systems with a 32-bit `size_t`, the math to calculate the buffer size\ntriggers an integer overflow when the username length exceeds 1GB and the\npassword name length is close to 2GB in size. This integer overflow usually\ncauses a tiny buffer to actually get allocated instead of the intended huge\none, making the use of that buffer end up in a heap buffer overflow.\n\n(This bug is similar to\n[CVE-2018-14618](https://curl.se/docs/CVE-2018-14618.html).)","status":"published","published":"2018-10-31T08:00:00Z","modified":"2026-10-25T01:05:28.979301935Z","updated_at":"2026-11-02T15:43:55.669514Z"},{"id":"DLA-1568-1","title":"curl - security update","status":"published","published":"2018-11-06T00:00:00Z","modified":"2026-03-09T01:19:41.352813Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DSA-4331-1","title":"curl - security update","status":"published","published":"2018-11-02T00:00:00Z","modified":"2026-03-09T02:11:42.682125Z","updated_at":"2026-11-02T15:46:16.862196Z"},{"id":"openSUSE-SU-2024:10582-1","title":"curl-7.79.1-1.1 on GA media","description":"These are all security issues fixed in the curl-7.79.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:40:36.472951Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2018:3624-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\n- CVE-2018-16839: A SASL password overflow via integer overflow was fixed which could lead to crashes (bsc#1112758)\n- CVE-2018-16840: A use-after-free in SASL handle close was fixed which could lead to crashes (bsc#1112758)\n- CVE-2018-16842: A Out-of-bounds Read in tool_msgs.c was fixed which could lead to crashes (bsc#1113660)\n\n","status":"published","published":"2018-11-05T16:55:38Z","modified":"2026-02-04T03:02:44.934958Z","updated_at":"2026-11-02T15:53:45.378228Z"},{"id":"SUSE-SU-2019:0339-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2019-3822: Fixed a NTLMv2 type-3 header stack buffer overflow (bsc#1123377).\n- CVE-2019-3823: Fixed an out-of-bounds read in the SMTP end-of-response (bsc#1123378).\n- CVE-2018-16890: Fixed an out-of-bounds buffer read in NTLM type2 (bsc#1123371). \n- CVE-2018-16842: Fixed an out-of-bounds read in tool_msgs.c (bsc#1113660).\n- CVE-2018-16840: Fixed a use-after-free in handle close  (bsc#1113029).\n- CVE-2018-16839: Fixed an SASL password overflow caused by an integer overflow (bsc#1112758).\n\n","status":"published","published":"2019-02-13T07:33:54Z","modified":"2026-02-04T03:49:52.261316Z","updated_at":"2026-11-02T15:53:45.926331Z"},{"id":"SUSE-SU-2019:0996-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2018-16839: Fixed a buffer overflow in the SASL authentication code (bsc#1112758).\n","status":"published","published":"2019-04-23T16:43:09Z","modified":"2026-02-04T04:31:32.097387Z","updated_at":"2026-11-02T15:53:45.926331Z"},{"id":"USN-3805-1","title":"curl vulnerabilities","description":"Harry Sintonen discovered that curl incorrectly handled SASL\nauthentication. A remote attacker could use this issue to cause curl to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2018-16839)\n\nBrian Carpenter discovered that curl incorrectly handled memory when\nclosing certain handles. A remote attacker could use this issue to cause\ncurl to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2018-16840)\n\nBrian Carpenter discovered that the curl command-line tool incorrectly\nhandled error messages. A remote attacker could possibly use this issue to\nobtain sensitive information. (CVE-2018-16842)\n","status":"published","published":"2018-10-31T12:38:53Z","modified":"2026-04-22T09:51:03.745102Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}