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Fencer Vulns
high 7.5

CVE-2020-12758 json

Denial of Service (DoS) in HashiCorp Consul

published 2020-06-11 6 y ago modified 2026-09-08 2 mo ago also BIT-consul-2020-12758 , EUVD-2022-1142 , GHSA-q2qr-3c2p-9235 , GO-2022-0861

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

HashiCorp Consul and Consul Enterprise could crash when configured with an abnormally-formed service-router entry. Introduced in 1.6.0, fixed in 1.6.6 and 1.7.4.

Patch / fix

  • go github.com/hashicorp/consul 1.6.6, 1.7.4
  • bitnami consul 1.6.6, 1.7.4
  • hashicorp consul 1.6.6, 1.7.4
  • consul Debian 11 1.7.4+dfsg1-1

debian advisories DEBIAN-CVE-2020-12758

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/consul
>=1.6.0-beta1, <1.6.6
>=1.7.0, <1.7.4
1.6.6
1.7.4
bitnami consul
>=1.6.0, <1.6.6
>=1.7.0, <1.7.4
1.6.6
1.7.4

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-404 Improper Resource Shutdown or Release

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.