BIG-IP DNS & GTM: Improper Neutralization of Input During Web Page Generation
CVE-2022-23013 is a high-severity improper neutralization of input during web page generation vulnerability in BIG-IP DNS & GTM, 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. There is no confirmed exploitation so far. EPSS estimates a 0.8% chance of exploitation within 30 days, higher than 57% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Big-ip Domain Name System to 14.1.4.4 or 15.1.4 or 16.1.0, whichever matches your release line, or a later version.
- Update Big-ip Global Traffic Manager to 14.1.4.4 or 15.1.4 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.
- 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 |
|---|---|---|---|
| BIG-IP DNS & GTM | BIG-IP DNS & GTM | Not specified in the record | Not stated |
| F5 | Big-ip Domain Name System | 11.0.0 through 11.6.5; 12.0.0 through 12.1.6; 13.0.0 through 13.1.4; 14.0.0 up to, but not including, 14.1.4.4; 15.1.0 up to, but not including, 15.1.4; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.4, 15.1.4, 16.1.0 |
| F5 | Big-ip Global Traffic Manager | 11.0.0 through 11.6.5; 12.0.0 through 12.1.6; 13.0.0 through 13.1.4; 14.0.0 up to, but not including, 14.1.4.4; 15.1.0 up to, but not including, 15.1.4; 16.0.0 up to, but not including, 16.1.0 | 14.1.4.4, 15.1.4, 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
- 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 | NVD |
| CVSS 2.0 | 4.3 | Medium | NVD |
Official description
On BIG-IP DNS & GTM version 16.x before 16.1.0, 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, and all versions of 13.1.x, 12.1.x, and 11.6.x, a DOM-based cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. 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: Improper Neutralization of Input During Web Page Generation
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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. Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
- Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Input During Web Page Generation vulnerabilities (CWE-79)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Recent Improper Neutralization of Input During Web Page Generation vulnerabilities
- 9.0 Critical severity
- 9.0 Critical severity
- 9.6 Critical severity
- 8.0 High severity
- 5.4 Medium severity
OpenPLC ScadaBR Cross-site Scripting Exploited
- 6.1 Medium severity
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