CVE-2018-5744: A specially crafted packet can cause named to leak memory

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-09 · updated 2026-06-17
Weakness: CWE-772

Description

A failure to free memory can occur when processing messages having a specific combination of EDNS options. Versions affected are: BIND 9.10.7 -> 9.10.8-P1, 9.11.3 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.10.7-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected.

Affected products

ISC BIND: from 9.10.7 before 9.10.8; from 9.11.3 before 9.11.5; from 9.12.0 before 9.12.3; from 9.13.0 before 9.13.6; 9.10.7-s1, 9.10.8, 9.10.8-p1, 9.10.8-rc1, 9.10.8-rc2, 9.11.5 (+6) — fixed in 9.10.8, 9.11.5, 9.12.3, 9.13.6

How to fix

Upgrade to a fixed version: ISC BIND 9.10.8, 9.11.5, 9.12.3, 9.13.6. Check the vendor advisory for mitigations.

References

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