Cisco Firepower Threat Defense Software: Comparison Using Wrong Factors
CVE-2024-20342 is a high-severity comparison using wrong factors vulnerability in Cisco Firepower Threat Defense Software from Cisco, with a CVSS 3.1 base score of 8.6 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Cisco Firepower Threat Defense Software versions: 7.0.0; 7.0.0.1; 7.0.1, 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 0.49% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Snort to 3.1.74.0 or a later version.
- Update Secure Firewall Threat Defense to 7.0.6.2 or 7.2.6 or 7.4.2, whichever matches your release line, or a later version.
- Read the advisory on sec.cloudapps.cisco.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cisco | Cisco Firepower Threat Defense Software | 7.0.0; 7.0.0.1; 7.0.1; 7.1.0; 7.0.1.1; 7.1.0.1; 7.0.2; 7.2.0; and 24 more ranges | Not stated |
| Cisco | firepower_threat_defense_software | 6.7.0 through 7.4.1.1 | Not stated |
| Cisco | Snort | 3.0.0.0 up to, but not including, 3.1.74.0 | 3.1.74.0 |
| Cisco | Secure Firewall Threat Defense | before 7.0.6.2; 7.2.0 up to, but not including, 7.2.6; 7.4.0 up to, but not including, 7.4.2; 7.1.0; 7.3.0 | 7.0.6.2, 7.2.6, 7.4.2 |
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
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- 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:C/C:N/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.8 | Medium | CNA (cisco.com) |
| CVSS 3.1 | 8.6 | High | NVD |
Official description
Multiple Cisco products are affected by a vulnerability in the rate filtering feature of the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured rate limiting filter. This vulnerability is due to an incorrect connection count comparison. An attacker could exploit this vulnerability by sending traffic through an affected device at a rate that exceeds a configured rate filter. A successful exploit could allow the attacker to successfully bypass the rate filter. This could allow unintended traffic to enter the network protected by the affected device.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Comparison Using Wrong Factors
The code performs a comparison between two entities, but the comparison examines the wrong factors or characteristics of the entities.
More Comparison Using Wrong Factors vulnerabilities (CWE-1025)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Cisco Firepower Threat Defense Software
- 9.0 Critical severity
- 8.6 High severity
- 8.6 High severity
- 8.5 High severity
- 7.7 High severity
- 8.6 High severity
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