How severe is CVE-2014-0239?

CVE-2014-0239 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-0239 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 68% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-0239?

CVE-2014-0239 affects Samba. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-0239?

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

When was CVE-2014-0239 published?

CVE-2014-0239 was published on 2014-05-28 and last updated on 2026-06-17.

CVE-2014-0239

CVE-2014-0239 is a medium-severity vulnerability in Samba with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 68% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 68% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Samba
Published: 2014-05-28
Last modified: 2026-06-17

Description

The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header section of an incoming DNS message before sending a response, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged response packet that triggers a communication loop, a related issue to CVE-1999-0103.

Frequently asked questions

What is CVE-2014-0239?: The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header section of an incoming DNS message before sending a response, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged response packet that triggers a communication loop, a related issue to CVE-1999-0103.
How severe is CVE-2014-0239?: CVE-2014-0239 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-0239 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 68% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-0239?: CVE-2014-0239 affects Samba. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-0239?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-0239 published?: CVE-2014-0239 was published on 2014-05-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

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