BIG-IP: NULL Pointer Dereference
CVE-2022-23017 is a high-severity NULL pointer dereference vulnerability in BIG-IP, 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. There is no confirmed exploitation so far. EPSS estimates a 0.92% 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 Access Policy Manager to 14.1.4.5 or 15.1.4.1 or 16.1.0, whichever matches your release line, or a later version.
- Update Big-ip Advanced Firewall Manager to 14.1.4.5 or 15.1.4.1 or 16.1.0, whichever matches your release line, or a later version.
- Update Big-ip Analytics to 14.1.4.5 or 15.1.4.1 or 16.1.0, 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 |
|---|---|---|---|
| BIG-IP | BIG-IP | Not specified in the record | Not stated |
| F5 | Big-ip Access Policy Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Advanced Firewall Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Analytics | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Application Acceleration Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Application Security Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Domain Name System | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Fraud Protection Service | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Global Traffic Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Link Controller | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Local Traffic Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
| F5 | Big-ip Policy Enforcement Manager | 13.1.0 through 13.1.4; 14.1.0 up to, but not including, 14.1.4.5; 15.1.0 up to, but not including, 15.1.4.1; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.5, 15.1.4.1, 16.1.0 |
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 | NVD |
| CVSS 2.0 | 7.1 | High | NVD |
Official description
On BIG-IP version 16.x before 16.1.0, 15.1.x before 15.1.4.1, 14.1.x before 14.1.4.5, and all versions of 13.1.x, when a virtual server is configured with a DNS profile with the Rapid Response Mode setting enabled and is configured on a BIG-IP system, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. 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: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How developers prevent this class of flaw
- For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
- Select a programming language that is not susceptible to these issues.
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in BIG-IP
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Recent NULL Pointer Dereference vulnerabilities
- 7.5 High severity
- 7.8 High severity
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