{"id":"CVE-2020-10030","aliases":["ALPINE-CVE-2020-10030","DEBIAN-CVE-2020-10030","EUVD-2020-2495","GHSA-v7fw-2gqv-66rx","UBUNTU-CVE-2020-10030","openSUSE-SU-2020:0698-1","openSUSE-SU-2024:11157-1"],"status":"published","title":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an...","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.24495,"percentile":0.97902,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2020-05-19T12:00:00Z","modified":"2026-11-03T06:31:39Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"pdns-recursor","fixed_in":["4.1.16-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"pdns-recursor","fixed_in":["4.1.16-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"pdns-recursor","fixed_in":["4.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["4.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["4.3.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.10","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.16-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.9","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.16-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-1","4.0.0~alpha1-1","4.0.0~alpha1-2","4.0.0~alpha2-2","4.0.0~alpha2-2ubuntu0.1","4.0.0~alpha2-2ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.6-1","4.0.6-1build1","4.0.7-1","4.1.1-1","4.1.1-1build1","4.1.1-2","4.1.1-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.0-6","4.2.1-1","4.2.1-1build1","4.2.1-1build2","4.2.1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"SUSE:Package Hub 12 SP1","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.12-bp151.4.3.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.12-bp151.4.3.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 15.1","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.12-bp151.4.3.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.5-1.3"}]}],"bundled":18}],"products":[{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-03.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00052.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PS4ZN5XGENYNFKX7QIIOUCQQHXE37GJF/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMP72NJGKBWR5WEBXAWX5KSLQUDFTG6S/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-10030"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NMP72NJGKBWR5WEBXAWX5KSLQUDFTG6S/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PS4ZN5XGENYNFKX7QIIOUCQQHXE37GJF/"},{"url":"https://github.com/advisories/GHSA-v7fw-2gqv-66rx"},{"url":"https://security.alpinelinux.org/vuln/CVE-2020-10030","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-10030","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-10030","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2020/05/19/3","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-10030","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/LEZPG4GM5KFH6L7EPATOSNLDHKRJP667/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1171553","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10030","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10995","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-12244","tags":["web"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2120","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7068","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-15090","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-15092","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-15093","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-15094","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000003","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-10851","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-14626","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-14644","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-16855","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-3806","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-3807","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-14196","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-25829","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T15:52:20Z","modified":"2024-08-04T10:50:57.821Z","updated_at":"2026-11-02T14:35:48.213211Z"}],"euvd":[{"id":"EUVD-2020-2495","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T15:52:20Z","modified":"2024-08-04T10:50:57Z","updated_at":"2026-11-03T03:07:51.994742Z"}],"ghsa":[{"id":"GHSA-v7fw-2gqv-66rx","title":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an...","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2022-05-24T17:18:06Z","modified":"2023-01-29T05:02:57Z","updated_at":"2026-11-02T14:45:12.348503Z"}],"nvd":[{"id":"CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T16:15:10.917Z","modified":"2026-06-17T02:47:14.133Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:06:00.784809Z"}],"osv":[{"id":"ALPINE-CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T16:15:10.917Z","modified":"2026-11-03T06:31:39.389199538Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T07:18:15.355745Z"},{"id":"CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T16:15:10.917Z","modified":"2026-10-24T10:30:58.833896355Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:13.492058Z"},{"id":"DEBIAN-CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T16:15:10.917Z","modified":"2026-10-26T12:00:06.441792884Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"UBUNTU-CVE-2020-10030","description":"An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\\0' termination.) Under some conditions, this issue can lead to the writing of one '\\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.","status":"published","published":"2020-05-19T12:00:00Z","modified":"2025-09-08T16:46:01Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:22.212782Z"},{"id":"openSUSE-SU-2020:0698-1","title":"Security update for pdns-recursor","description":"This update for pdns-recursor fixes the following issues:\n\n- update to 4.1.16\n  * fixes an issue where records in the answer section of\n    a NXDOMAIN response lacking an SOA were not properly validated\n    (CVE-2020-12244, boo#1171553)\n  * fixes an issue where invalid hostname on the server can result in\n    disclosure of invalid memory (CVE-2020-10030, boo#1171553)\n  * fixes an issue in the DNS protocol has been found that allows\n    malicious parties to use recursive DNS services to attack third\n    party authoritative name servers (CVE-2020-10995, boo#1171553)\n\nFor details see\nhttps://doc.powerdns.com/recursor/changelog/4.1.html#change-4.1.16\n\n","status":"published","published":"2020-05-23T07:22:00Z","modified":"2026-02-04T02:48:32.953843Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2024:11157-1","title":"pdns-recursor-4.5.5-1.3 on GA media","description":"These are all security issues fixed in the pdns-recursor-4.5.5-1.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:57:58.848357Z","updated_at":"2026-11-02T16:58:34.894275Z"}]}}