A denial of service flaw was found in the way BIND handled query requests when using DNS64 with "break-dnssec yes" option. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS request.
Find out more about CVE-2017-3136 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS3 Base Score | 5.9 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Attack Vector | Network |
Attack Complexity | High |
Privileges Required | None |
User Interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | High |
Platform | Errata | Release Date |
---|---|---|
Red Hat Enterprise Linux 7 (bind) | RHSA-2017:1095 | 2017-04-19 |
Red Hat Enterprise Linux 6 (bind) | RHSA-2017:1105 | 2017-04-20 |
Platform | Package | State |
---|---|---|
Red Hat Enterprise Linux 5 | bind97 | Not affected |
Red Hat Enterprise Linux 5 | bind | Not affected |
Servers which have configurations which require DNS64 and "break-dnssec yes;" should upgrade. Servers which are not using these features in conjunction are not at risk from this defect.