An error in TSIG authentication can permit unauthorized dynamic updates
CVE-2017-3143

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind 9
Vendor
CVE Published:
16 January 2019

Badges

👾 Exploit Exists🟣 EPSS 24%

What is CVE-2017-3143?

An attacker who is able to send and receive messages to an authoritative DNS server and who has knowledge of a valid TSIG key name for the zone and service being targeted may be able to manipulate BIND into accepting an unauthorized dynamic update. Affects BIND 9.4.0->9.8.8, 9.9.0->9.9.10-P1, 9.10.0->9.10.5-P1, 9.11.0->9.11.1-P1, 9.9.3-S1->9.9.10-S2, 9.10.5-S1->9.10.5-S2.

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Affected Version(s)

BIND 9 9.4.0->9.8.8, 9.9.0->9.9.10-P1, 9.10.0->9.10.5-P1, 9.11.0->9.11.1-P1, 9.9.3-S1->9.9.10-S2, 9.10.5-S1->9.10.5-S2

References

https://kb.isc.org/docs/aa-01503
x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1680
vendor-advisoryx_refsource_REDHAT
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLo...
x_refsource_CONFIRM

EPSS Score

24% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Clément Berthaux from Synacktiv for reporting this issue.
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