{"id":"CVE-2024-33851","aliases":["EUVD-2024-1074","GHSA-3494-cfwf-56hw"],"status":"published","title":"mdanter/ecc affected by timing vulnerability in cryptographic side-channels","description":"phpecc, as used in paragonie/phpecc before 2.0.1, has a branch-based timing leak in Point addition. (This is related to phpecc/phpecc on GitHub, and the Matyas Danter ECC library.)","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00408,"percentile":0.35513,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2024-04-27T00:00:00Z","modified":"2026-10-28T02:30:32Z","fixes":[{"ecosystem":"Packagist","package":"paragonie/ecc","fixed_in":["2.0.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"paragonie/ecc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.1"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"mdanter/ecc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"paragonie/ecc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.1"}]}],"versions":["v2.0.0"]},{"source":"osv","ecosystem":"Packagist","package":"mdanter/ecc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}],"versions":["0.2.0","v0.3.0","v0.3.1","v0.3.2","v0.4.0","v0.4.1","v0.4.2","v0.4.3","v0.4.4","v0.4.5","v0.4.6","v0.4.7","v0.5.0","v0.5.1","v0.5.2","v1.0.0"]}],"references":[{"url":"https://github.com/paragonie/phpecc/releases/tag/v2.0.1","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-33851","tags":["advisory"]},{"url":"https://github.com/phpecc/phpecc/issues/289","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/mdanter/ecc/CVE-2024-33851.yaml","tags":["web"]},{"url":"https://github.com/paragonie/phpecc/releases/tag/v2.0.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3494-cfwf-56hw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/33xxx/CVE-2024-33851.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-33851","description":"phpecc, as used in paragonie/phpecc before 2.0.1, has a branch-based timing leak in Point addition. (This is related to phpecc/phpecc on GitHub, and the Matyas Danter ECC library.)","status":"published","published":"2024-04-27T00:00:00Z","modified":"2024-11-04T15:09:12.756Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"adp"}],"updated_at":"2026-11-02T14:34:21.404483Z"}],"euvd":[{"id":"EUVD-2024-1074","description":"phpecc, as used in paragonie/phpecc before 2.0.1, has a branch-based timing leak in Point addition. (This is related to phpecc/phpecc on GitHub, and the Matyas Danter ECC library.)","status":"published","published":"2024-04-27T00:00:00Z","modified":"2024-11-04T15:09:12Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:05:11.811805Z"}],"ghsa":[{"id":"GHSA-3494-cfwf-56hw","title":"mdanter/ecc affected by timing vulnerability in cryptographic side-channels","description":"phpecc, as used in **all versions** of mdanter/ecc, as well as paragonie/ecc before 2.0.1, has a branch-based timing leak in Point addition. (This Composer package is also known as phpecc/phpecc on GitHub, previously known as the Matyas Danter ECC library.)\n\nParagon Initiative Enterprises [hard-forked phpecc/phpecc](https://github.com/phpecc/phpecc/issues/289) and discovered the issue in the original code, then released v2.0.1 which fixes the vulnerability. [The upstream code](https://github.com/phpecc/phpecc) is no longer maintained and remains vulnerable for all versions.","status":"published","published":"2024-04-28T00:30:22Z","modified":"2024-11-04T21:24:45Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T14:38:16.477822Z"}],"nvd":[{"id":"CVE-2024-33851","description":"phpecc, as used in paragonie/phpecc before 2.0.1, has a branch-based timing leak in Point addition. (This is related to phpecc/phpecc on GitHub, and the Matyas Danter ECC library.)","status":"published","published":"2024-04-27T22:15:08.05Z","modified":"2026-06-17T07:32:25.697Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"updated_at":"2026-11-02T14:09:55.124919Z"}],"osv":[{"id":"CVE-2024-33851","description":"phpecc, as used in paragonie/phpecc before 2.0.1, has a branch-based timing leak in Point addition. (This is related to phpecc/phpecc on GitHub, and the Matyas Danter ECC library.)","status":"published","published":"2024-04-27T00:00:00Z","modified":"2026-10-28T02:30:32.454552634Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:40.391953Z"},{"id":"GHSA-3494-cfwf-56hw","title":"mdanter/ecc affected by timing vulnerability in cryptographic side-channels","description":"phpecc, as used in **all versions** of mdanter/ecc, as well as paragonie/ecc before 2.0.1, has a branch-based timing leak in Point addition. (This Composer package is also known as phpecc/phpecc on GitHub, previously known as the Matyas Danter ECC library.)\n\nParagon Initiative Enterprises [hard-forked phpecc/phpecc](https://github.com/phpecc/phpecc/issues/289) and discovered the issue in the original code, then released v2.0.1 which fixes the vulnerability. [The upstream code](https://github.com/phpecc/phpecc) is no longer maintained and remains vulnerable for all versions.","status":"published","published":"2024-04-28T00:30:22Z","modified":"2024-12-05T05:49:06.376791Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T15:46:35.050232Z"}]}}