CVE-2020-13250Network attack vector

Service interruption via unbounded agent cache

Published Jun 11, 2020 · Updated Aug 4, 2024

Cache exhaustion in HashiCorp Consul and Consul Enterprise 1.2.0 through 1.6.5 and 1.7.0 through 1.7.3 allows remote attackers to interrupt service. The agent cache expires or evicts entries but places no limit on total cache size, allowing crafted HTTP API or DNS requests to consume memory until service is interrupted. The HTTP cache is enabled by default and honors the cached query parameter, while DNS exposure requires dns_config.use_cache.

CVSS severity7.5
High
EPSS probability2.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cache exhaustion in HashiCorp Consul and Consul Enterprise 1.2.0 through 1.6.5 and 1.7.0 through 1.7.3 allows remote attackers to interrupt service. The agent cache expires or evicts entries but places no limit on total cache size, allowing crafted HTTP API or DNS requests to consume memory until service is interrupted. The HTTP cache is enabled by default and honors the cached query parameter, while DNS exposure requires dns_config.use_cache.

The record

CVE
CVE-2020-13250
Published
Jun 11, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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