vulnwire
4.9med

CVE-2018-5745

An assertion failure can occur if a trust anchor rolls over to an unsupported key algorithm when using managed-keys

Published 7 y ago · modified 2 mo ago · JSON

CVSS
4.9
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
2.3%
percentile 83%
Public exploits
0
none known

"managed-keys" is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertion failure if, during key rollover, a trust anchor's keys are replaced with keys which use an unsupported algorithm. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.9.3-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. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5745.

Exploit prediction (EPSS)

2.29% probability of exploitation in the next 30 days, higher than 83% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.04.9CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD3.14.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA3.04.9CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD2.03.5AV:N/AC:M/Au:S/C:N/I:N/A:P

Affected products

  • ISC BIND 9

Classification

Weakness
  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm

References

  • kb.isc.org /docs/cve-2018-5745 · x_refsource_CONFIRM, x_transferred
  • access.redhat.com /errata/RHSA-2019:3552 · vendor-advisory, x_refsource_REDHAT, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.