CyberSecBulletin
CVE-2023-43611NVD status: Modified

BIG-IP Edge Client: Improper Verification of Cryptographic Signature

Published Updated By the CyberSecBulletin desk

CVE-2023-43611 is a high-severity improper verification of cryptographic signature vulnerability in BIG-IP Edge Client from F5, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 7.2.4.4 as the first without the flaw, so updating BIG-IP Edge Client to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.16% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update BIG-IP Edge Client to 7.2.4.4 or a later version.
  2. Update Big-ip Access Policy Manager to 7.2.4.4 or 15.1.9 or 16.1.4, whichever matches your release line, or a later version.
  3. Update Big-ip Advanced Firewall Manager to 15.1.9 or 16.1.4, whichever matches your release line, or a later version.
  4. Read the advisory on my.f5.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
F5BIG-IP Edge Client7.2.3 up to, but not including, 7.2.4.47.2.4.4
F5Big-ip Access Policy Manager7.2.3 up to, but not including, 7.2.4.4; 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.47.2.4.4, 15.1.9, 16.1.4
F5Big-ip Advanced Firewall Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Advanced Web Application Firewall13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Analytics13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Application Acceleration Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Application Security Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Application Visibility And Reporting13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Carrier-grade Nat13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Ddos Hybrid Defender13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Domain Name System13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Edge Gateway13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Fraud Protection Service13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Global Traffic Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Link Controller13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Local Traffic Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Policy Enforcement Manager13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip SSL Orchestrator13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Webaccelerator13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4
F5Big-ip Websafe13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 up to, but not including, 15.1.9; 16.1.0 up to, but not including, 16.1.415.1.9, 16.1.4

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
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (f5.com).

Official description

The BIG-IP Edge Client Installer on macOS does not follow best practices for elevating privileges during the installation process. This vulnerability is due to an incomplete fix for CVE-2023-38418. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

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

The underlying weakness: Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in BIG-IP Edge Client

All BIG-IP Edge Client vulnerabilities

Recent Improper Verification of Cryptographic Signature vulnerabilities

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