GHSA-xxxq-chmp-67g4CriticalCVSS 9.8
RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign
🔗 CVE IDs covered (1)
📋 Description
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
🎯 Affected products1
- npm/jsrsasign:< 8.0.18
🔗 References (12)
- https://github.com/kjur/jsrsasign/security/advisories/GHSA-xxxq-chmp-67g4
- https://nvd.nist.gov/vuln/detail/CVE-2020-14967
- https://github.com/kjur/jsrsasign/issues/439
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967
- https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt
- https://vuldb.com/?id.157124
- 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://www.npmjs.com/package/jsrsasign
- https://security.netapp.com/advisory/ntap-20200724-0001/
- https://github.com/advisories/GHSA-xxxq-chmp-67g4