BIG-IP: Incorrect Conversion between Numeric Types
CVE-2022-27189 is a high-severity incorrect conversion between numeric types 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 versions 16.1.2.2, 15.1.5.1, 14.1.4.6 as the first without the flaw, so updating BIG-IP to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.93% chance of exploitation within 30 days, higher than 61% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update BIG-IP to 16.1.2.2 or 15.1.5.1 or 14.1.4.6 or 13.1.5, whichever matches your release line, or a later version.
- Read the advisory on support.f5.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 |
|---|---|---|---|
| F5 | BIG-IP | 12.1.x; 11.6.x; 16.1.x up to, but not including, 16.1.2.2; 15.1.x up to, but not including, 15.1.5.1; 14.1.x up to, but not including, 14.1.4.6; 13.1.x up to, but not including, 13.1.5 | 16.1.2.2, 15.1.5.1, 14.1.4.6, 13.1.5 |
| F5 | Big-ip Access Policy Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Advanced Firewall Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Analytics | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Application Acceleration Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Application Security Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Domain Name System | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Fraud Protection Service | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Global Traffic Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Link Controller | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Local Traffic Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not stated |
| F5 | Big-ip Policy Enforcement Manager | 11.6.1; 11.6.2; 11.6.3; 11.6.4; 11.6.5; 12.1.0; 12.1.1; 12.1.2; and 23 more ranges | Not 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 system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | CNA (f5.com) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all versions of 12.1.x and 11.6.x, when an Internet Content Adaptation Protocol (ICAP) profile is configured on a virtual server, undisclosed traffic can cause an increase in Traffic Management Microkernel (TMM) memory resource utilization. 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: Incorrect Conversion between Numeric Types
When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.
How developers prevent this class of flaw
- Avoid making conversion between numeric types. Always check for the allowed ranges.
More Incorrect Conversion between Numeric Types vulnerabilities (CWE-681)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in BIG-IP
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F5 BIG-IP APM Heap-based Buffer Overflow Exploited
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Recent Incorrect Conversion between Numeric Types vulnerabilities
- 7.5 High severity
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