Information Exposure Affecting libcrypto++ package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
1.96% (79th percentile)

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  • Snyk IDSNYK-DEBIAN9-LIBCRYPTO-1911980
  • published5 Nov 2021
  • disclosed4 Nov 2021

Introduced: 4 Nov 2021

CVE-2021-43398  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

There is no fixed version for Debian:9 libcrypto++.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcrypto++ package and not the libcrypto++ package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1