{"id":"UBUNTU-CVE-2015-8803","details":"The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.","modified":"2026-01-30T02:54:09.151856Z","published":"2015-12-31T00:00:00Z","related":["USN-2897-1"],"upstream":["CVE-2015-8803"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-8803"},{"type":"REPORT","url":"https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html"},{"type":"REPORT","url":"http://seclists.org/oss-sec/2016/q1/273"},{"type":"REPORT","url":"https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2897-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-8803"}],"affected":[{"package":{"name":"nettle","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/nettle@2.7.1-1ubuntu0.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.1-1ubuntu0.1"}]}],"versions":["2.7.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhogweed2","binary_version":"2.7.1-1ubuntu0.1"},{"binary_name":"libnettle4","binary_version":"2.7.1-1ubuntu0.1"},{"binary_name":"nettle-bin","binary_version":"2.7.1-1ubuntu0.1"},{"binary_name":"nettle-dev","binary_version":"2.7.1-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-8803.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}