What’s Vulnerable › Vulnerabilities

CVE-2020-14966

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-06-22 · updated 2026-06-22
• Weakness: CWE-347

Description

An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid. This could have a security-relevant impact if an application relied on a single canonical signature.

Affected products

• jsrsasign: through 8.0.18
• NetApp Max Data: all versions

References

• https://github.com/kjur/jsrsasign/issues/437
• https://github.com/kjur/jsrsasign/releases/tag/8.0.17
• https://github.com/kjur/jsrsasign/releases/tag/8.0.18
• https://kjur.github.io/jsrsasign/
• https://security.netapp.com/advisory/ntap-20200724-0001/
• https://www.npmjs.com/package/jsrsasign
• https://github.com/kjur/jsrsasign/issues/437
• https://github.com/kjur/jsrsasign/releases/tag/8.0.17
• https://github.com/kjur/jsrsasign/releases/tag/8.0.18
• https://kjur.github.io/jsrsasign/
• https://security.netapp.com/advisory/ntap-20200724-0001/
• https://www.npmjs.com/package/jsrsasign

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