{"id":"CVE-2019-13628","aliases":["DEBIAN-CVE-2019-13628","EUVD-2022-4925","GHSA-q95h-vc86-hv77","PYSEC-2026-1066","UBUNTU-CVE-2019-13628"],"status":"published","title":"wolfCrypt leaks cryptographic information via timing side channel","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0038,"percentile":0.32287,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203"],"published":"2019-10-03T13:20:44Z","modified":"2026-10-24T10:30:34Z","fixes":[{"ecosystem":"PyPI","package":"wolfcrypt","fixed_in":["4.1.0"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"wolfssl","fixed_in":["4.1.0+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"wolfssl","fixed_in":["4.1.0+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"wolfcrypt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.0.0"},{"fixed":"4.1.0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0+dfsg-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"wolfcrypt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0"}]}],"versions":["0.1.8","0.1.9","0.2.0","0.2.6","3.12.2.post0","3.13.0.post1","3.14.0.post1","3.14.2.post0"]},{"source":"osv","ecosystem":"PyPI","package":"wolfcrypt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0"}]}],"versions":["0.1.8","0.1.9","0.2.0","0.2.6","3.12.2.post0","3.13.0.post1","3.14.0.post1","3.14.2.post0"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.8+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"wolfssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.2+dfsg-2","3.12.0+dfsg-1","3.12.2+dfsg-1","3.13.0+dfsg-1"]}],"products":[{"vendor":"wolfssl","product":"wolfssl"}],"references":[{"url":"https://eprint.iacr.org/2011/232.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory","advisory","web"]},{"url":"https://tches.iacr.org/index.php/TCHES/article/view/7337","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory","advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2019/10/02/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://minerva.crocs.fi.muni.cz/","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-13628","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q95h-vc86-hv77","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-13628","tags":["advisory"]},{"url":"https://github.com/wolfSSL/wolfcrypt-py","tags":["package"]},{"url":"https://minerva.crocs.fi.muni.cz","tags":["web"]},{"url":"https://pypi.org/project/wolfcrypt","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2019-13628","tags":["report"]},{"url":"https://github.com/wolfSSL/wolfssl/pull/2353","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-13628","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-13628","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T13:20:44Z","modified":"2024-08-04T23:57:39.493Z","updated_at":"2026-11-02T14:20:24.678649Z"}],"euvd":[{"id":"EUVD-2022-4925","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T13:20:44Z","modified":"2024-08-04T23:57:39Z","updated_at":"2026-11-03T02:40:41.590409Z"}],"ghsa":[{"id":"GHSA-q95h-vc86-hv77","title":"wolfCrypt leaks cryptographic information via timing side channel","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2022-05-24T16:57:48Z","modified":"2023-09-25T19:35:51Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:37:06.234371Z"}],"nvd":[{"id":"CVE-2019-13628","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T14:15:11.057Z","modified":"2026-06-17T02:17:06.743Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":1.2,"vector":"AV:L/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:05:31.019577Z"}],"osv":[{"id":"CVE-2019-13628","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T14:15:11.057Z","modified":"2026-10-24T10:30:34.615736048Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:11.029493Z"},{"id":"DEBIAN-CVE-2019-13628","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T14:15:11.057Z","modified":"2026-09-21T07:02:05.806404327Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:31.467893Z"},{"id":"GHSA-q95h-vc86-hv77","title":"wolfCrypt leaks cryptographic information via timing side channel","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2022-05-24T16:57:48Z","modified":"2026-07-07T11:56:31.306586815Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:46:54.40888Z"},{"id":"PYSEC-2026-1066","title":"wolfCrypt leaks cryptographic information via timing side channel","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2026-07-06T08:03:28.431283Z","modified":"2026-07-07T11:45:36.876574658Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:54.622769Z"},{"id":"UBUNTU-CVE-2019-13628","description":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","status":"published","published":"2019-10-03T14:15:00Z","modified":"2026-04-22T12:09:33.319217Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:19.6877Z"}]}}