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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2014-0239 from the MITRE CVE dictionary dictionary and NIST NVD.
Not vulnerable. This issue does not affect the version of samba as shipped with Red Hat Enterprise Linux 5 and 6. This issue does not affect the version of samba3x as shipped with Red Hat Enterprise Linux 5. This issue does not affect the version of samba4 as shipped with Red Hat Enterprise Linux 6.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 1.8 |
|---|---|
| Base Metrics | AV:A/AC:H/Au:N/C:N/I:N/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Gluster Storage 2.1 | samba | Not affected |
| Red Hat Enterprise Linux 7 | samba | Not affected |
| Red Hat Enterprise Linux 6 | samba4 | Not affected |
| Red Hat Enterprise Linux 6 | samba | Not affected |
| Red Hat Enterprise Linux 5 | samba | Not affected |
| Red Hat Enterprise Linux 5 | samba3x | Not affected |
| Red Hat Enterprise Linux 4 | samba | Not affected |
Vulmon