CyberSecBulletin
CVE-2022-29153NVD status: Modified

Consul: Server-Side Request Forgery

Published Updated By the CyberSecBulletin desk

CVE-2022-29153 is a high-severity server-side request forgery vulnerability in Consul from HashiCorp, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 1.9.17, 1.10.10, 1.11.5 as the first without the flaw, so updating Consul to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 8.75% chance of exploitation within 30 days, which is in the top 4.76% of all scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Consul to 1.9.17 or 1.10.10 or 1.11.5, whichever matches your release line, or a later version.
  2. Read the advisory on discuss.hashicorp.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
HashiCorpConsulbefore 1.9.17; 1.10.0 up to, but not including, 1.10.10; 1.11.0 up to, but not including, 1.11.51.9.17, 1.10.10, 1.11.5
Fedora ProjectFedora37Not stated

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighNVD
CVSS 2.05.0MediumNVD

Official description

HashiCorp Consul and Consul Enterprise up to 1.9.16, 1.10.9, and 1.11.4 may allow server side request forgery when the Consul client agent follows redirects returned by HTTP health check endpoints. Fixed in 1.9.17, 1.10.10, and 1.11.5.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Server-Side Request Forgery

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

How developers prevent this class of flaw

  • If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation.
  • If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation.

More Server-Side Request Forgery vulnerabilities (CWE-918)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Consul

All Consul vulnerabilities

Recent Server-Side Request Forgery vulnerabilities

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