Vulnerability · Published Jun 22, 2020 · Assigned by mitre
CVE-2020-14966
High 7.5
In plain English
A high-severity security flaw in the jsrsasign package (npm). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.1%top 33.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | jsrsasign | 8.0.19 | GHSA-p8c3-7rj8-q963 |
Affected products (as reported)
References
- https://kjur.github.io/jsrsasign/ x_refsource_MISC
- https://www.npmjs.com/package/jsrsasign x_refsource_MISC
- https://github.com/kjur/jsrsasign/issues/437 x_refsource_MISC
- https://github.com/kjur/jsrsasign/releases/tag/8.0.18 x_refsource_MISC
- https://github.com/kjur/jsrsasign/releases/tag/8.0.17 x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200724-0001/ x_refsource_CONFIRM