An error handling synthesized records could cause an assertion failure when using DNS64 with "break-dnssec yes;"
CVE-2017-3136

5.9MEDIUM

Key Information:

Vendor

Isc
Status
Bind 9
Vendor
CVE Published:
16 January 2019

What is CVE-2017-3136?

A query with a specific set of characteristics could cause a server using DNS64 to encounter an assertion failure and terminate. An attacker could deliberately construct a query, enabling denial-of-service against a server if it was configured to use the DNS64 feature and other preconditions were met. Affects BIND 9.8.0 -> 9.8.8-P1, 9.9.0 -> 9.9.9-P6, 9.9.10b1->9.9.10rc1, 9.10.0 -> 9.10.4-P6, 9.10.5b1->9.10.5rc1, 9.11.0 -> 9.11.0-P3, 9.11.1b1->9.11.1rc1, 9.9.3-S1 -> 9.9.9-S8.

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Affected Version(s)

BIND 9 9.8.0 -> 9.8.8-P1, 9.9.0 -> 9.9.9-P6, 9.9.10b1->9.9.10rc1, 9.10.0 -> 9.10.4-P6, 9.10.5b1->9.10.5rc1, 9.11.0 -> 9.11.0-P3, 9.11.1b1->9.11.1rc1, 9.9.3-S1 -> 9.9.9-S8

References

https://access.redhat.com/errata/RHSA-2017:1095
vendor-advisoryx_refsource_REDHAT
https://security.gentoo.org/glsa/201708-01
vendor-advisoryx_refsource_GENTOO
https://security.netapp.com/advisory/ntap-20180802-0002/
x_refsource_CONFIRM

EPSS Score

49% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Oleg Gorokhov of Yandex for making us aware of this vulnerability.
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