Is CVE-2021-43839 in the CISA KEV catalog?

No. CVE-2021-43839 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43839?

CVE-2021-43839 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-43839?

CVE-2021-43839 has an EPSS score of 1.31% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43839?

Upgrade cronos to 0.6.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-43839

HIGH

7.5

CVSS v3

NVD

Description

Cronos is a commercial implementation of a blockchain. In Cronos nodes running versions before v0.6.5, it is possible to take transaction fees from Cosmos SDK's FeeCollector for the current block by sending a custom crafted MsgEthereumTx. This problem has been patched in Cronos v0.6.5. There are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience.

CWE-670

How to fix

Remediation Available

cronosNVD

Affected:< 0.6.5Fixed in:0.6.5CVE-2021-43839derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.31%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Patch2

Third-Party Advisory1

github.com

Embed a live status badge for CVE-2021-43839

Markdown

[![CVE-2021-43839](https://tridentstack.com/cve/badge/CVE-2021-43839.svg)](https://tridentstack.com/cve/CVE-2021-43839)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-43839"><img src="https://tridentstack.com/cve/badge/CVE-2021-43839.svg" alt="CVE-2021-43839"></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.