How severe is CVE-2008-4100?

CVE-2008-4100 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2008-4100 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4100?

CVE-2008-4100 primarily affects Gnu Adns. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4100?

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

When was CVE-2008-4100 published?

CVE-2008-4100 was published on 2008-09-18 and last updated on 2026-06-16.

CVE-2008-4100

CVE-2008-4100 is a medium-severity vulnerability in Gnu Adns with a CVSS 2.0 base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Gnu Adns
Published: 2008-09-18
Last modified: 2026-06-16

Description

GNU adns 1.4 and earlier uses a fixed source port and sequential transaction IDs for DNS requests, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than CVE-2008-1447. NOTE: the vendor reports that this is intended behavior and is compatible with the product's intended role in a trusted environment.

Frequently asked questions

What is CVE-2008-4100?: GNU adns 1.4 and earlier uses a fixed source port and sequential transaction IDs for DNS requests, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than CVE-2008-1447. NOTE: the vendor reports that this is intended behavior and is compatible with the product's intended role in a trusted environment.
How severe is CVE-2008-4100?: CVE-2008-4100 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2008-4100 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4100?: CVE-2008-4100 primarily affects Gnu Adns. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4100?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-4100 published?: CVE-2008-4100 was published on 2008-09-18 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:gnu:adns:*:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.1:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.2:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.3:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.4:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.5:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.6:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.7:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.8:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:0.9:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:1.0:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:1.1:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:1.2:*:*:*:*:*:*:*
cpe:2.3:a:gnu:adns:1.3:*:*:*:*:*:*:*

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