CVE-2020-14967 – jsrsasign

Package

Manager: npm
Name: jsrsasign
Vulnerable Version: >=0 <8.0.18

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00339 pctl0.56002

Details

RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign ### Impact Jsrsasign supports RSA PKCS#1 v1.5 (i.e. RSAES-PKCS1-v1_5) and RSA-OAEP encryption and decryption. Its encrypted message is represented as BigInteger. When there is a valid encrypted message, a crafted message with prepending zeros can be decrypted by this vulnerability. - If you don't use RSA PKCS1-v1_5 or RSA-OAEP decryption, this vulnerability is not affected. - Risk to forge contents of encrypted message is very low. - Risk to raise memory corruption is low since jsrsasign uses BigInteger class. ### Patches Users using RSA PKCS1-v1_5 or RSA-OAEP decryption should upgrade to 8.0.18. ### Workarounds Reject RSA PKCS1-v1_5 or RSA-OAEP encrypted message with unnecessary prepending zeros. ### References https://nvd.nist.gov/vuln/detail/CVE-2020-14967 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967 https://vuldb.com/?id.157124 https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt https://github.com/kjur/jsrsasign/issues/439

Metadata

Created: 2020-06-26T16:27:08Z
Modified: 2023-01-31T01:29:40Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/06/GHSA-xxxq-chmp-67g4/GHSA-xxxq-chmp-67g4.json
CWE IDs: ["CWE-119"]
Alternative ID: GHSA-xxxq-chmp-67g4
Finding: F316
Auto approve: 1