CVE-2017-3143
A flaw was found in the way BIND handled TSIG authentication for dynamic updates. A remote attacker able to communicate with an authoritative BIND server could use this flaw to manipulate the contents of a zone, by forging a valid TSIG or SIG(0) signature for a dynamic update request.
Find out more about CVE-2017-3143 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | High |
| Availability Impact | None |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (bind) | RHSA-2017:1680 | 2017-07-05 |
| Red Hat Enterprise Linux 6 (bind) | RHSA-2017:1679 | 2017-07-05 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | bind97 | Will not fix |
| Red Hat Enterprise Linux 5 | bind | Not affected |
Acknowledgements
Red Hat would like to thank Internet Systems Consortium for reporting this issue. Upstream acknowledges Clement Berthaux (Synacktiv) as the original reporter.Mitigation
The effects of this vulnerability can be mitigated by using Access Control Lists (ACLs) that require both address range validation and use of TSIG authentication in parallel. For information on how to configure this type of compound authentication control, please see: