Ultimate Member – User Profile, Registration…: Improper Control of Generation of Code
CVE-2022-3384 is a high-severity improper control of generation of code vulnerability in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin from Ultimatemember, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin versions: 2.5.0 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 3.06% chance of exploitation within 30 days, higher than 88% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ultimatemember | Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin | 2.5.0 and earlier | Not stated |
| Ultimatemember | Ultimate Member | 2.5.0 and earlier | 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
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- 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:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA (wordfence.com) |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
The Ultimate Member plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.5.0 via the populate_dropdown_options function that accepts user supplied input and passes it through call_user_func(). This is restricted to non-parameter PHP functions like phpinfo(); since user supplied parameters are not passed through the function. This makes it possible for authenticated attackers, with administrative privileges, to execute code on the server.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Generation of Code
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
How developers prevent this class of flaw
- Refactor your program so that you do not have to dynamically generate code.
- Run your code in a jail or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product. Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection. This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise. Be careful to avoid CWE-243 and other weaknesses related to jails.
- Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
More Improper Control of Generation of Code vulnerabilities (CWE-94)
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
Patches and release notes
Third-party and government advisories
- wordfence.com/vulnerability-advisories-continued/#CVE-2022-3384Third Party Advisory
Technical write-ups (may include proof of concept)
- github.com/H4de5-7/vulnerabilities/blob/main/CVE-2022-3383%20%26%26%20CVE-2022-3384.mdExploit, Third Party Advisory
- yuque.com/docs/share/8796eef9-ac4c-4339-96b4-6c21313ecf3eExploit, Third Party Advisory
Other references
Other vulnerabilities in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
- 7.2 High severity
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 8.0 High severity
- 7.5 High severity
Recent Improper Control of Generation of Code vulnerabilities
- 7.2 High severity
- 9.8 Critical severity
- 7.2 High severity
- 6.8 Medium severity
Mitel MiVoice Connect Code Injection Exploited
- 9.8 Critical severity
- 9.8 Critical severity
Spotted an error? Tell us.