What’s Vulnerable › Vulnerabilities

CVE-2018-5737: BIND 9.12's serve-stale implementation can cause an assertion failure in rbtdb.c or other undesirable behavior, even if serve-stale is not enabled.

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-01-16 · updated 2026-06-17
• Weakness: CWE-617

Description

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.

Affected products

• ISC BIND: 9.12.0, 9.12.1
• NetApp Cloud Backup: all versions
• NetApp Data Ontap Edge: all versions

References

• http://www.securityfocus.com/bid/104236
• http://www.securitytracker.com/id/1040942
• https://kb.isc.org/docs/aa-01606
• https://security.netapp.com/advisory/ntap-20180926-0004/
• http://www.securityfocus.com/bid/104236
• http://www.securitytracker.com/id/1040942
• https://kb.isc.org/docs/aa-01606
• https://security.netapp.com/advisory/ntap-20180926-0004/

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