CVE-2021-43398
CVSS V2 Medium 5
CVSS V3 Medium 5.3
Description
** 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.
Overview
- CVE ID
- CVE-2021-43398
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-11-04T21:15:09
- Last Modified Date
- 2022-04-18T18:03:24
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:* | 1 | OR | 8.6.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/weidai11/cryptopp/issues/1080 | Exploit Third Party Advisory |
| https://cryptopp.com | Vendor Advisory |
| https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222 | Exploit Issue Tracking Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-43398 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43398 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 15:41:44 | Added to TrackCVE | |||
| 2022-12-05 13:52:58 | 2021-11-04T21:15Z | 2021-11-04T21:15:09 | CVE Published Date | updated |
| 2022-12-05 13:52:58 | 2022-04-18T18:03:24 | CVE Modified Date | updated | |
| 2022-12-05 13:52:58 | Analyzed | Vulnerability Status | updated |