CyberSecBulletin
CVE-2024-48886NVD status: Analyzed

FortiOS: Weak Authentication

Published Updated By the CyberSecBulletin desk

CVE-2024-48886 is a critical-severity weak authentication vulnerability in FortiOS from Fortinet, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected FortiOS versions: 7.4.0 through 7.4.4; 7.2.0 through 7.2.8; 7.0.0 through 7.0.15, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.48% chance of exploitation within 30 days, which is low compared with other CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Fortianalyzer to 7.4.4 or 7.6.2, whichever matches your release line, or a later version.
  2. Update Fortianalyzer Cloud to 7.4.4 or a later version.
  3. Update Fortimanager to 7.4.4 or 7.6.2, whichever matches your release line, or a later version.
  4. Read the advisory on fortiguard.fortinet.com for workarounds and exact fixed builds.
  5. 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
FortinetFortiOS7.4.0 through 7.4.4; 7.2.0 through 7.2.8; 7.0.0 through 7.0.15; 6.4.0 through 6.4.15Not stated
FortinetFortiProxy7.4.0 through 7.4.4; 7.2.0 through 7.2.10; 7.0.0 through 7.0.17; 2.0.0 through 2.0.14Not stated
FortinetFortianalyzer7.4.1 up to, but not including, 7.4.4; 7.6.0 up to, but not including, 7.6.27.4.4, 7.6.2
FortinetFortianalyzer Cloud7.4.1 up to, but not including, 7.4.47.4.4
FortinetFortimanager7.4.1 up to, but not including, 7.4.4; 7.6.0 up to, but not including, 7.6.27.4.4, 7.6.2
FortinetFortimanager Cloud7.4.1 up to, but not including, 7.4.47.4.4

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

Scoring systemScoreSeverityScored by
CVSS 3.19.0CriticalCNA (fortinet.com)
CVSS 3.19.8CriticalNVD

Official description

A weak authentication in Fortinet FortiOS versions 7.4.0 through 7.4.4, 7.2.0 through 7.2.8, 7.0.0 through 7.0.15, 6.4.0 through 6.4.15, FortiProxy versions 7.4.0 through 7.4.4, 7.2.0 through 7.2.10, 7.0.0 through 7.0.17, 2.0.0 through 2.0.14, FortiManager versions 7.6.0 through 7.6.1, 7.4.1 through 7.4.3, FortiManager Cloud versions 7.4.1 through 7.4.3, FortiAnalyzer Cloud versions 7.4.1 through 7.4.3 allows attacker to execute unauthorized code or commands via a brute-force attack.

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

The underlying weakness: Weak Authentication

The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.

More Weak Authentication vulnerabilities (CWE-1390)

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 FortiOS

All FortiOS vulnerabilities

Recent Weak Authentication vulnerabilities

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