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Fencer Vulns
medium 5.3

CVE-2018-5736 json

An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND atte…

published 2019-01-16 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17505

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
18.0%
EPSS 18.0% chance of exploitation in 30 days, percentile 97%
public exploits
1
Metasploit

Summary

An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.

Patch / fix

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 9.12.1_p2-r0

alpine advisories ALPINE-CVE-2018-5736

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind Arch Linux 9.12.1.P2-1

arch linux advisories AVG-706

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-5736 updated cvss 5.3

bind: Multiple transfers of a zone in quick succession can cause an assertion failure in rbtdb.c

  • Red Hat Enterprise Linux 5 bind, bind97 Red Hat Enterprise Linux 6 bind, bind-sdb, bind-libs, bind-utils, bind-chroot Red Hat Enterprise Linux 7 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +6 more Red Hat Enterprise Linux 8 bind, bind-sdb, bind-libs, bind-utils, bind-chroot, bind-pkcs11, +7 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/linux/local/docker_runc_escape)
  2. Published

Exploit prediction

17.96% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.