How severe is CVE-2002-0423?

CVE-2002-0423 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2002-0423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-0423?

CVE-2002-0423 primarily affects Efingerd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-0423?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2002-0423 published?

CVE-2002-0423 was published on 2002-08-12 and last updated on 2026-06-16.

CVE-2002-0423

CVE-2002-0423 is a critical-severity vulnerability in Efingerd with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Efingerd
Published: 2002-08-12
Last modified: 2026-06-16

Description

Buffer overflow in efingerd 1.5 and earlier, and possibly up to 1.61, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a finger request from an IP address with a long hostname that is obtained via a reverse DNS lookup.

Frequently asked questions

What is CVE-2002-0423?: Buffer overflow in efingerd 1.5 and earlier, and possibly up to 1.61, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a finger request from an IP address with a long hostname that is obtained via a reverse DNS lookup.
How severe is CVE-2002-0423?: CVE-2002-0423 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2002-0423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0423?: CVE-2002-0423 primarily affects Efingerd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2002-0423 published?: CVE-2002-0423 was published on 2002-08-12 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:efingerd:efingerd:1.3:*:*:*:*:*:*:*
cpe:2.3:a:efingerd:efingerd:1.6.1:*:*:*:*:*:*:*

More vulnerabilities in Efingerd

CVE-2002-0424 — Medium (CVSS 4.6): efingerd 1.61 and earlier, when configured without the -u option, executes .efingerd files as the efingerd user…

All CVEs affecting Efingerd →