What is CVE-2021-43668?

CVE-2021-43668 is a medium-severity vulnerability in Ethereum Go, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-11-18.

How severe is CVE-2021-43668?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-43668 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Ethereum Go

CVE-2021-43668

Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.

EPSS: 0.003 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ethereum Go_ethereum — versions 1.10.9
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-43668?: CVE-2021-43668 is a medium-severity vulnerability in Ethereum Go, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-11-18.
How severe is CVE-2021-43668?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-43668 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.