ECDSA signature vulnerability of Minerva timing attack in jsrsasign
Impact
ECDSA side-channel attack named Minerava have been found and it was found that it affects to jsrsasign.
Execution time of thousands signature generation have been observed then EC private key which is scalar value may be recovered since point and scalar multiplication time depends on bits of scalar. In jsrsasign 8.0.13 or later, execution time of EC point and scalar multiplication is almost constant and fixed for the issue.
- Minerva is one of timing attack or side channel attack for EC.
- If you don't use ECDSA class, you are not affected the vulnerability.
- The vulnerability is that attacker may guess private key by checking processing time of EC key generation or ECDSA signing.
- The cause issue is that point multiplication processing time in ECDSA signing is depends on private key value.
- After 8.0.13, processing time of point multiplication in ECDSA signing have become constant for key value in theory.
Patches
Users using ECDSA signature generation should upgrade to 8.0.13 or later.
Workarounds
There is no workarounds in jsrsasign. Update jsrsasign or use other ECDSA library.
ACKNOWLEDGEMENT
Thanks to Jan Jancar @J08nY, Petr Svenda and Vladimir Sedlacek of Masaryk University in Czech Republic to find and report this vulnerability.
References
https://minerva.crocs.fi.muni.cz/ https://www.npmjs.com/advisories/1505 https://github.com/kjur/jsrsasign/issues/411
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | jsrsasign | >= 4.0.0, < 8.0.13 | 8.0.13 |
Referencias
- https://github.com/kjur/jsrsasign/security/advisories/GHSA-g753-jx37-7xwh
- https://github.com/kjur/jsrsasign/issues/411
- https://github.com/kjur/jsrsasign/commit/9dcb89c57408a3d4b5b66aa9138426bd92819e73
- https://github.com/kjur/jsrsasign
- https://github.com/kjur/jsrsasign/releases/tag/8.0.13
- https://minerva.crocs.fi.muni.cz
- https://snyk.io/vuln/SNYK-JS-JSRSASIGN-561755
- https://www.npmjs.com/advisories/1505
- Vector CVSS
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N- Debilidad (CWE)
CWE-362- Plataforma
- npm
- Paquete
jsrsasign- Publicada
- 30.06.2020
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-g753-jx37-7xwh - CC BY 4.0
Historial de vulnerabilidades: jsrsasign
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 14
- Primera → última
- 06.2020 03.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 4
- Alta 7
- Media 2
- Baja 1
Divulgaciones por año
- 2020: 4
- 2021: 1
- 2022: 2
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 6
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ECDSA signature vulnerability of Minerva timing attack in jsrsasign esta entrada
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