How severe is CVE-2004-0371?

CVE-2004-0371 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2004-0371 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0371?

CVE-2004-0371 primarily affects Kth Heimdal. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0371?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-0371 published?

CVE-2004-0371 was published on 2004-05-04 and last updated on 2026-06-16.

CVE-2004-0371

CVE-2004-0371 is a medium-severity vulnerability in Kth Heimdal with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kth Heimdal
Published: 2004-05-04
Last modified: 2026-06-16

Description

Heimdal 0.6.x before 0.6.1 and 0.5.x before 0.5.3 does not properly perform certain consistency checks for cross-realm requests, which allows remote attackers with control of a realm to impersonate others in the cross-realm trust path.

Frequently asked questions

What is CVE-2004-0371?: Heimdal 0.6.x before 0.6.1 and 0.5.x before 0.5.3 does not properly perform certain consistency checks for cross-realm requests, which allows remote attackers with control of a realm to impersonate others in the cross-realm trust path.
How severe is CVE-2004-0371?: CVE-2004-0371 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-0371 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0371?: CVE-2004-0371 primarily affects Kth Heimdal. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0371?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0371 published?: CVE-2004-0371 was published on 2004-05-04 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:kth:heimdal:0.4a:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.4b:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.4c:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.4d:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.4e:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.5:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.5.1:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.5.2:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.6.0:*:*:*:*:*:*:*

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