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CVE-2014-0239

The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header...

5.0 MediumFix available

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.

Exploit likelihood

66.8%Up 65.6 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2014-0239
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2014-0239
Updated
2026-11-02
EUVDEUVD-2014-0277 No score

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.

Record
EUVD-2014-0277
Updated
2026-11-03
GitHub AdvisoriesGHSA-4rm5-v8f4-mx8v No score

The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header...

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.

Record
GHSA-4rm5-v8f4-mx8v
Weakness
CWE-20
Updated
2026-11-02
OSV No score

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.

Record
CVE-2014-0239
Updated
2026-11-02
OSVDEBIAN-CVE-2014-0239 No score

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.

Record
DEBIAN-CVE-2014-0239
Updated
2026-11-02
OSVopenSUSE-SU-2024:10069-1 No score

ctdb-4.5.0-1.1 on GA media

These are all security issues fixed in the ctdb-4.5.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10069-1
Updated
2026-11-02
OSVUBUNTU-CVE-2014-0239 No score

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.

Record
UBUNTU-CVE-2014-0239
Updated
2026-11-02
OSVUSN-2257-1 No score

samba vulnerabilities

Christof Schmitt discovered that Samba incorrectly initialized a certain response field when vfs shadow copy was enabled. A remote authenticated attacker could use this issue to possibly obtain sensitive information. This issue only affected Ubuntu 13.10 and Ubuntu 14.04 LTS. (CVE-2014-0178)

It was discovered that the Samba internal DNS server incorrectly handled QR fields when processing incoming DNS messages. A remote attacker could use this issue to cause Samba to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-0239)

Daniel Berteaud discovered that the Samba NetBIOS name service daemon incorrectly handled certain malformed packets. A remote attacker could use this issue to cause Samba to consume resources, resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 13.10, and Ubuntu 14.04 LTS. (CVE-2014-0244)

Simon Arlott discovered that Samba incorrectly handled certain unicode path names. A remote authenticated attacker could use this issue to cause Samba to stop responding, resulting in a denial of service. (CVE-2014-3493)

Record
USN-2257-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
samba
Debian:12
before 2:4.1.8+dfsg-1
2:4.1.8+dfsg-1
samba
Debian:13
before 2:4.1.8+dfsg-1
2:4.1.8+dfsg-1
samba
Debian:14
before 2:4.1.8+dfsg-1
2:4.1.8+dfsg-1
samba
Ubuntu:14.04:LTS
before 2:4.1.6+dfsg-1ubuntu2.14.04.2, plus listed versions
2:3.6.18-1ubuntu32:4.0.10+dfsg-4ubuntu22:4.0.13+dfsg-1ubuntu12:4.1.3+dfsg-2ubuntu22:4.1.3+dfsg-2ubuntu3
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2:4.1.3+dfsg-2ubuntu42:4.1.3+dfsg-2ubuntu52:4.1.6+dfsg-1ubuntu12:4.1.6+dfsg-1ubuntu22:4.1.6+dfsg-1ubuntu2.14.04.1
2:4.1.6+dfsg-1ubuntu2.14.04.2
samba
Ubuntu:14.04:LTS
From an advisory covering 4 CVEs
before 2:4.1.6+dfsg-1ubuntu2.14.04.2, plus listed versions
2:3.6.18-1ubuntu32:4.0.10+dfsg-4ubuntu22:4.0.13+dfsg-1ubuntu12:4.1.3+dfsg-2ubuntu22:4.1.3+dfsg-2ubuntu3
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2:4.1.3+dfsg-2ubuntu42:4.1.3+dfsg-2ubuntu52:4.1.6+dfsg-1ubuntu12:4.1.6+dfsg-1ubuntu22:4.1.6+dfsg-1ubuntu2.14.04.1
2:4.1.6+dfsg-1ubuntu2.14.04.2
samba
openSUSE:Tumbleweed
From an advisory covering 56 CVEs
before 4.5.0-1.1
4.5.0-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2014-0239 is a medium vulnerability (CVSS 5.0) in Samba, published May 28, 2014. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 66.8%, the 99th percentile. Fixed in samba 2:4.1.8+dfsg-1.

References

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