{"id":"CVE-2019-11840","aliases":["DEBIAN-CVE-2019-11840","DLA-1840-1","DLA-2402-1","DLA-2442-1","DLA-2454-1","DLA-2527-1","DLA-3455-1","EUVD-2022-5096","GHSA-r5c5-pr8j-pfp7","GO-2022-0209","RHBA-2020:0063","RHSA-2021:0079","UBUNTU-CVE-2019-11840"],"status":"published","title":"golang.org/x/crypto/salsa20/salsa uses insufficiently random values","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03452,"percentile":0.89107,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-330"],"published":"2019-05-09T00:00:00Z","modified":"2026-10-22T23:15:41Z","fixes":[{"ecosystem":"Go","package":"golang.org/x/crypto","fixed_in":["0.0.0-20190320223903-b7391e95e576"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"golang-go.crypto","fixed_in":["1:0.0~git20200221.2aa609c-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"golang-go.crypto","fixed_in":["1:0.0~git20200221.2aa609c-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"golang-go.crypto","fixed_in":["1:0.0~git20200221.2aa609c-1"],"sources":["osv"]},{"ecosystem":"Debian:8","package":"golang-go.crypto","fixed_in":["0.0~hg190-1+deb8u1"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"obfs4proxy","fixed_in":["0.0.7-1+deb8u1"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"rclone","fixed_in":["1.35-1+deb8u1"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"snapd","fixed_in":["2.21-2+deb9u1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"golang.org/x/crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.0-20190320223903-b7391e95e576"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0~git20200221.2aa609c-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0~git20200221.2aa609c-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0~git20200221.2aa609c-1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0~hg190-1+deb8u1"}]}],"versions":["0.0~hg190-1"]},{"source":"osv","ecosystem":"Debian:9","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1+deb8u1"}]}],"versions":["1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1"],"bundled":3},{"source":"osv","ecosystem":"Debian:9","package":"obfs4proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.7-1+deb8u1"}]}],"versions":["0.0.7-1"]},{"source":"osv","ecosystem":"Debian:9","package":"rclone","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.35-1+deb8u1"}]}],"versions":["1.35-1"]},{"source":"osv","ecosystem":"Debian:9","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.21-2+deb9u1"}]}],"versions":["2.21-2"]},{"source":"osv","ecosystem":"Debian:10","package":"golang-go.crypto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.0~git20181203.505ab14-1+deb10u1"}]}],"versions":["1:0.0~git20181203.505ab14-1"],"bundled":3},{"source":"osv","ecosystem":"Go","package":"golang.org/x/crypto","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20190320223903-b7391e95e576"}]}]},{"source":"osv","ecosystem":"Go","package":"golang.org/x/crypto","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20190320223903-b7391e95e576"}]}]},{"source":"osv","ecosystem":"Red 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Required","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1691529","tags":["x_transferred","Issue Tracking","Vendor Advisory","report","web"]},{"url":"https://go.googlesource.com/crypto/+/b7391e95e576cacdcdd422573063bc057239113d","tags":["x_transferred","Mailing List","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/golang/go/issues/30965","tags":["x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00029.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/11/msg00016.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2020/11/msg00030.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/01/msg00015.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html","tags":["mailing-list","x_transferred","Third Party Advisory","web"]},{"url":"https://pkg.go.dev/vuln/GO-2022-0209","tags":["x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-11840","tags":["advisory"]},{"url":"https://groups.google.com/forum/#!msg/golang-announce/tjyNcJxb2vQ/n0NRBziSCAAJ","tags":["web","article","report"]},{"url":"https://go.dev/cl/168406","tags":["web","fix"]},{"url":"https://go.dev/issue/30965","tags":["web","report"]},{"url":"https://groups.google.com/g/golang-announce/c/tjyNcJxb2vQ/m/n0NRBziSCAAJ","tags":["web"]},{"url":"https://github.com/advisories/GHSA-r5c5-pr8j-pfp7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-11840","tags":["advisory"]},{"url":"https://github.com/golang/go","tags":["package"]},{"url":"https://access.redhat.com/errata/RHBA-2020:0063","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1773099","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhba-2020_0063.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10401","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764357","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10401","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10401","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10402","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764363","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10402","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10402","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10403","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764366","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10403","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10403","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10404","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764367","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10404","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10404","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10405","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764369","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10405","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10405","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-10406","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1764370","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10406","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10406","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-11840","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-11840","tags":["advisory","report"]},{"url":"https://access.redhat.com/errata/RHSA-2021:0079","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1866789","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1870050","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1881319","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1883632","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1891051","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_0079.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-8554","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-8554","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8554","tags":["advisory"]},{"url":"https://blog.champtar.fr/K8S_MITM_LoadBalancer_ExternalIPs/","tags":["article"]},{"url":"https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-26137","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-26137","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26137","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-11840","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-11840","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T00:00:00Z","modified":"2024-08-04T23:03:32.886Z","updated_at":"2026-11-02T14:32:22.432545Z"}],"euvd":[{"id":"EUVD-2022-5096","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T00:00:00Z","modified":"2024-08-04T23:03:32Z","updated_at":"2026-11-03T02:40:47.960625Z"}],"ghsa":[{"id":"GHSA-r5c5-pr8j-pfp7","title":"golang.org/x/crypto/salsa20/salsa uses insufficiently random values","description":"An issue was discovered in supplementary Go cryptography libraries, aka golang-googlecode-go-crypto, before 2019-03-20. A flaw was found in the amd64 implementation of golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.\n\n### Specific Go Packages Affected\ngolang.org/x/crypto/salsa20/salsa","status":"published","published":"2022-05-24T16:45:25Z","modified":"2023-09-29T15:47:39Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:37:06.913882Z"}],"nvd":[{"id":"CVE-2019-11840","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T16:29:00.607Z","modified":"2026-06-17T02:13:43.4Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:05:13.880207Z"}],"osv":[{"id":"CVE-2019-11840","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T16:29:00.607Z","modified":"2026-03-15T22:21:16.897136Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:10.718934Z"},{"id":"DEBIAN-CVE-2019-11840","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T16:29:00.607Z","modified":"2026-09-21T07:00:38.512881587Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:31.467893Z"},{"id":"GHSA-r5c5-pr8j-pfp7","title":"golang.org/x/crypto/salsa20/salsa uses insufficiently random values","description":"An issue was discovered in supplementary Go cryptography libraries, aka golang-googlecode-go-crypto, before 2019-03-20. A flaw was found in the amd64 implementation of golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.\n\n### Specific Go Packages Affected\ngolang.org/x/crypto/salsa20/salsa","status":"published","published":"2022-05-24T16:45:25Z","modified":"2026-09-10T03:49:36.602783909Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T15:46:55.480549Z"},{"id":"RHBA-2020:0063","title":"Red Hat Bug Fix Advisory: OpenShift Container Platform 4.3 RPM release advisory","status":"published","published":"2024-09-18T04:08:22Z","modified":"2026-05-19T10:01:39Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:58.636919Z"},{"id":"RHSA-2021:0079","title":"Red Hat Security Advisory: OpenShift Container Platform 3.11.374 bug fix and security update","status":"published","published":"2024-09-18T04:29:41Z","modified":"2026-06-29T10:33:37Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"UBUNTU-CVE-2019-11840","description":"An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.","status":"published","published":"2019-05-09T16:29:00Z","modified":"2026-10-22T23:15:41.066508092Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:19.202697Z"},{"id":"DLA-1840-1","title":"golang-go.crypto - security update","status":"published","published":"2019-06-30T00:00:00Z","modified":"2026-03-09T01:21:15.550185Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DLA-2402-1","title":"golang-go.crypto - security update","status":"published","published":"2020-10-08T00:00:00Z","modified":"2026-03-09T01:23:02.294731Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DLA-2442-1","title":"obfs4proxy - security update","status":"published","published":"2020-11-10T00:00:00Z","modified":"2026-03-09T01:20:59.581937Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DLA-2454-1","title":"rclone - security update","status":"published","published":"2020-11-19T00:00:00Z","modified":"2026-03-09T01:20:44.789006Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DLA-2527-1","title":"snapd - security update","status":"published","published":"2021-01-18T00:00:00Z","modified":"2026-03-09T01:20:06.249677Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DLA-3455-1","title":"golang-go.crypto - security update","status":"published","published":"2023-06-16T00:00:00Z","modified":"2026-03-09T01:23:30.808978Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"GO-2022-0209","title":"Insufficiently random values in golang.org/x/crypto/salsa20","description":"XORKeyStream generates incorrect and insecure output for very large inputs.\n\nIf more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.\n\nThe issue might affect uses of golang.org/x/crypto/nacl with extremely large messages.\n\nArchitectures other than amd64 and uses that generate less than 256 GiB of keystream for a single salsa20.XORKeyStream invocation are unaffected.","status":"published","published":"2022-07-01T20:15:25Z","modified":"2026-02-04T04:34:27.332878Z","updated_at":"2026-11-02T15:47:00.604718Z"}]}}