CVE-2018-5737

moderate-risk
Published 2019-01-16

A problem with the implementation of the new serve-stale feature in BIND 9.12 can lead to an assertion failure in rbtdb.c, even when stale-answer-enable is off. Additionally, problematic interaction between the serve-stale feature and NSEC aggressive negative caching can in some cases cause undesirable behavior from named, such as a recursion loop or excessive logging. Deliberate exploitation of this condition could cause operational problems depending on the particular manifestation -- either degradation or denial of service. Affects BIND 9.12.0 and 9.12.1.

Do I need to act?

~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (4)

Affected Vendors

Isc Netapp

References (8)

Third Party Advisory http://www.securityfocus.com/bid/104236
Third Party Advisory http://www.securitytracker.com/id/1040942
Vendor Advisory https://kb.isc.org/docs/aa-01606
Third Party Advisory https://security.netapp.com/advisory/ntap-20180926-0004/
Third Party Advisory http://www.securityfocus.com/bid/104236
Third Party Advisory http://www.securitytracker.com/id/1040942
Vendor Advisory https://kb.isc.org/docs/aa-01606
Third Party Advisory https://security.netapp.com/advisory/ntap-20180926-0004/
32
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 4/34 · Minimal
Exposure 10/34 · Low