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Fencer Intel
medium 5.9

CVE-2018-5742 json

An oversight while backporting a feature leads to an assertion failure in buffer.c:420

published 7y ago modified 4mo ago also EUVD-2018-17511

cvss
5.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

While backporting a feature for a newer branch of BIND9, RedHat introduced a path leading to an assertion failure in buffer.c:420. Affects RedHat versions bind-9.9.4-65.el7 -> bind-9.9.4-72.el7. No ISC releases are affected. Other packages from other distributions who made the same error may also be affected.

Patch / fix

  • bind RHEL 7 32:9.9.4-73.el7_6
  • bind-sdb RHEL 7 32:9.9.4-73.el7_6
  • bind-libs RHEL 7 32:9.9.4-73.el7_6
  • bind-utils RHEL 7 32:9.9.4-73.el7_6
  • bind-chroot RHEL 7 32:9.9.4-73.el7_6
  • bind-pkcs11 RHEL 7 32:9.9.4-73.el7_6
  • bind-license RHEL 7 32:9.9.4-73.el7_6
  • bind-libs-lite RHEL 7 32:9.9.4-73.el7_6

red hat advisories RHSA-2019:0194

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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-2018-5742 updated cvss 5.9

bind: Crash from assertion error when debug log level is 10 and log entries meet buffer boundary

  • Red Hat Enterprise Linux Client (v. 7) bind 9.9.4-73.el7_6, bind-libs 9.9.4-73.el7_6, bind-utils 9.9.4-73.el7_6, bind-license 9.9.4-73.el7_6, bind-libs-lite 9.9.4-73.el7_6 Red Hat Enterprise Linux Client Optional (v. 7) bind 9.9.4-73.el7_6, bind-sdb 9.9.4-73.el7_6, bind-chroot 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-sdb-chroot 9.9.4-73.el7_6, bind-pkcs11-libs 9.9.4-73.el7_6, +1 more Red Hat Enterprise Linux ComputeNode (v. 7) bind 9.9.4-73.el7_6, bind-libs 9.9.4-73.el7_6, bind-utils 9.9.4-73.el7_6, bind-license 9.9.4-73.el7_6, bind-libs-lite 9.9.4-73.el7_6 Red Hat Enterprise Linux ComputeNode Optional (v. 7) bind 9.9.4-73.el7_6, bind-sdb 9.9.4-73.el7_6, bind-chroot 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-sdb-chroot 9.9.4-73.el7_6, bind-pkcs11-libs 9.9.4-73.el7_6, +1 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) bind 9.9.4-73.el7_6, bind-libs 9.9.4-73.el7_6, bind-utils 9.9.4-73.el7_6, bind-chroot 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-license 9.9.4-73.el7_6, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) bind-sdb 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-sdb-chroot 9.9.4-73.el7_6, bind-pkcs11-libs 9.9.4-73.el7_6, bind-pkcs11-utils 9.9.4-73.el7_6
    +4 more products
    Red Hat Enterprise Linux Server (v. 7) bind 9.9.4-73.el7_6, bind-libs 9.9.4-73.el7_6, bind-utils 9.9.4-73.el7_6, bind-chroot 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-license 9.9.4-73.el7_6, +3 more Red Hat Enterprise Linux Server Optional (v. 7) bind-sdb 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-sdb-chroot 9.9.4-73.el7_6, bind-pkcs11-libs 9.9.4-73.el7_6, bind-pkcs11-utils 9.9.4-73.el7_6 Red Hat Enterprise Linux Workstation (v. 7) bind 9.9.4-73.el7_6, bind-libs 9.9.4-73.el7_6, bind-utils 9.9.4-73.el7_6, bind-chroot 9.9.4-73.el7_6, bind-pkcs11 9.9.4-73.el7_6, bind-license 9.9.4-73.el7_6, +3 more Red Hat Enterprise Linux Workstation Optional (v. 7) bind-sdb 9.9.4-73.el7_6, bind-sdb-chroot 9.9.4-73.el7_6
    fixed: vendor fix “Ensure that debug logging is disabled and set to 0. This can be verified on the Bind server by the rndc status command.” RHSA-2019:0194
  • 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 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

Exploit prediction

1.58% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

  • RedHat BIND9

Classification

Weakness

References

Sources

Fencer Intel 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.