High severity · published Jun 22, 2020
CVE-2020-14966
An issue was discovered in the jsrsasign package through 8.0.18 for Node.js
7.5
CVSS
1.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JS
Jsrsasign · Kjur
through 8.0.18 · source: NVD
MD
Max Data · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-14966
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-14966
Exploit
https://github.com/kjur/jsrsasign/issues/437
Release Notes
https://github.com/kjur/jsrsasign/releases/tag/8.0.17
Release Notes
https://github.com/kjur/jsrsasign/releases/tag/8.0.18
Release Notes
https://kjur.github.io/jsrsasign/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20200724-0001/
Product
https://www.npmjs.com/package/jsrsasign
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