Is CVE-2021-43398 in the CISA KEV catalog?

No. CVE-2021-43398 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43398?

CVE-2021-43398 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-43398?

CVE-2021-43398 has an EPSS score of 1.90% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-43398?

No published fix for CVE-2021-43398 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2021-43398

MEDIUMEPSS 77th pctl

5.3

CVSS v3

NVD

Description

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

CWE-203

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

1.90%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Exploit2

Vendor Advisory1

cryptopp.com

Embed a live status badge for CVE-2021-43398

Markdown

[![CVE-2021-43398](https://tridentstack.com/cve/badge/CVE-2021-43398.svg)](https://tridentstack.com/cve/CVE-2021-43398)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-43398"><img src="https://tridentstack.com/cve/badge/CVE-2021-43398.svg" alt="CVE-2021-43398"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.