BIG-IP: Cross-Site Request Forgery
CVE-2022-41622 is a high-severity cross-site request forgery vulnerability in BIG-IP from F5, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected BIG-IP versions: 17.x; 16.1.x; 15.1.x, 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 92.4% chance of exploitation within 30 days, which is in the top 0.17% of all scored CVEs.
Exploitation in the next 30 days is more likely than not, according to EPSS.
What to do
- Check which version of BIG-IP you run against the affected versions below, and install the vendor's latest release.
- 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.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| F5 | BIG-IP | 17.x; 16.1.x; 15.1.x; 14.1.x; 13.1.x | Not stated |
| F5 | BIG-IQ Centralized Management | 8.x; 7.1.x | Not stated |
| F5 | Big-ip Advanced Firewall Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Analytics | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Access Policy Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Application Security Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Domain Name System | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Fraud Protection Service | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Global Traffic Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Link Controller | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Local Traffic Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Policy Enforcement Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | Not stated |
| F5 | Big-ip Application Acceleration Manager | 13.1.0 through 13.1.5; 14.1.0 through 14.1.5; 15.1.0 through 15.1.8; 16.1.0 through 16.1.3; 17.0.0 | 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
- RequiredA user must take an action such as opening a file or link.
- 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:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA (f5.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
In all versions, BIG-IP and BIG-IQ are vulnerable to cross-site request forgery (CSRF) attacks through iControl SOAP. 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: Cross-Site Request Forgery
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
How developers prevent this class of flaw
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, use anti-CSRF packages such as the OWASP CSRFGuard. Another example is the ESAPI Session Management control, which includes a component for CSRF.
- Ensure that the application is free of cross-site scripting issues (CWE-79), because most CSRF defenses can be bypassed using attacker-controlled script.
- Generate a unique nonce for each form, place the nonce into the form, and verify the nonce upon receipt of the form. Be sure that the nonce is not predictable (CWE-330).
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in BIG-IP
- 9.8 Critical severity
F5 BIG-IP APM Heap-based Buffer Overflow Exploited
- 8.8 High severity
- 7.5 High severity
- 8.7 High severity
- 8.7 High severity
- 7.5 High severity
Recent Cross-Site Request Forgery vulnerabilities
- 7.3 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 7.4 High severity
- 8.8 High severity
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