CVE-2021-43398

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

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

18 Apr 2022, 18:03

Type Values Removed Values Added
References (MISC) https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222 - (MISC) https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222 - Exploit, Issue Tracking, Third Party Advisory

17 Dec 2021, 16:15

Type Values Removed Values Added
Summary 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. ** 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.
References
  • (MISC) https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222 -

08 Nov 2021, 18:02

Type Values Removed Values Added
CPE cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 5.0
v3 : 5.3
References (MISC) https://github.com/weidai11/cryptopp/issues/1080 - (MISC) https://github.com/weidai11/cryptopp/issues/1080 - Exploit, Third Party Advisory
References (MISC) https://cryptopp.com - (MISC) https://cryptopp.com - Vendor Advisory
CWE CWE-203

04 Nov 2021, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-11-04 21:15

Updated : 2024-05-17 02:01

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