CVE-2021-43398

Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value
References
Link Resource
https://cryptopp.com Vendor Advisory
https://github.com/weidai11/cryptopp/issues/1080 Exploit Third Party Advisory
https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222 Exploit Issue Tracking Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:*

History

07 Nov 2023, 03:39

Type Values Removed Values Added
Summary ** DISPUTED ** Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value. Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value

Information

Published : 2021-11-04 21:15

Updated : 2024-08-04 04:16


NVD link : CVE-2021-43398

Mitre link : CVE-2021-43398

CVE.ORG link : CVE-2021-43398


JSON object : View

Products Affected

cryptopp

  • crypto\+\+
CWE
CWE-203

Observable Discrepancy