UBUNTU-CVE-2021-43398
- Source
- https://ubuntu.com/security/CVE-2021-43398
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43398.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-43398
- Withdrawn
- 2025-06-23T15:54:07Z
- Published
- 2021-11-04T21:15:00Z
- Modified
- 2021-11-04T21:15:00Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
** 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