{"id":"DEBIAN-CVE-2026-121505","details":"An out-of-bounds read in the NTS-KE client response parser (nts_client_process_response_core) in NTPsec before 1.2.4 allows a malicious NTS-KE server to read the client's stack memory, including pointers that defeat ASLR, which the client then sends in cleartext as NTS cookies, via an NTS-KE record whose declared length exceeds the data received.","modified":"2026-11-06T16:00:06.747221804Z","published":"2026-11-03T15:17:37.557Z","upstream":["CVE-2026-121505"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-121505"}],"affected":[{"package":{"name":"ntpsec","ecosystem":"Debian:12","purl":"pkg:deb/debian/ntpsec?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2+dfsg1-1","1.2.2+dfsg1-1+deb12u1","1.2.2+dfsg1-2","1.2.2+dfsg1-3","1.2.2+dfsg1-4","1.2.3+dfsg1-1","1.2.3+dfsg1-2","1.2.3+dfsg1-3","1.2.3+dfsg1-4","1.2.3+dfsg1-5","1.2.3+dfsg1-6","1.2.3+dfsg1-7","1.2.3+dfsg1-8","1.2.4+dfsg-1","1.2.5+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121505.json"}},{"package":{"name":"ntpsec","ecosystem":"Debian:13","purl":"pkg:deb/debian/ntpsec?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.3+dfsg1-8","1.2.4+dfsg-1","1.2.5+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121505.json"}},{"package":{"name":"ntpsec","ecosystem":"Debian:14","purl":"pkg:deb/debian/ntpsec?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4+dfsg-1"}]}],"versions":["1.2.3+dfsg1-8"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121505.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}