CyberSecBulletin
CVE-2022-41833NVD status: Modified

BIG-IP: Uncontrolled Resource Consumption

Published Updated By the CyberSecBulletin desk

CVE-2022-41833 is a high-severity uncontrolled resource consumption vulnerability in BIG-IP from F5, 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 version 13.1.x* as the first without the flaw, so updating BIG-IP to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.75% chance of exploitation within 30 days, higher than 55% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update BIG-IP to 13.1.x* or a later version.
  2. Read the advisory on support.f5.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
F5BIG-IP13.1.0 up to, but not including, 13.1.x*13.1.x*
F5Big-ip Access Policy Manager13.1.0 through 13.1.5Not stated
F5Big-ip Advanced Firewall Manager13.1.0 through 13.1.5Not stated
F5Big-ip Analytics13.1.0 through 13.1.5Not stated
F5Big-ip Application Acceleration Manager13.1.0 through 13.1.5Not stated
F5Big-ip Application Security Manager13.1.0 through 13.1.5Not stated
F5Big-ip Domain Name System13.1.0 through 13.1.5Not stated
F5Big-ip Fraud Protection Service13.1.0 through 13.1.5Not stated
F5Big-ip Global Traffic Manager13.1.0 through 13.1.5Not stated
F5Big-ip Link Controller13.1.0 through 13.1.5Not stated
F5Big-ip Local Traffic Manager13.1.0 through 13.1.5Not stated
F5Big-ip Policy Enforcement Manager13.1.0 through 13.1.5Not stated

Version data comes from the organisation that assigned the CVE. 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
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (f5.com)
CVSS 3.17.5HighNVD

Official description

In all BIG-IP 13.1.x versions, when an iRule containing the HTTP::collect command is configured on a virtual server, undisclosed requests can cause Traffic Management Microkernel (TMM) to terminate.

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

The underlying weakness: Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

How developers prevent this class of flaw

  • Ensure that protocols have specific limits of scale placed on them.
  • Ensure that all failures in resource allocation place the system into a safe posture.

More Uncontrolled Resource Consumption vulnerabilities (CWE-400)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in BIG-IP

All BIG-IP vulnerabilities

Recent Uncontrolled Resource Consumption vulnerabilities

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