Checkmk: Inclusion of Functionality from Untrusted Control Sphere
CVE-2022-46302 is a high-severity inclusion of functionality from untrusted control sphere vulnerability in Checkmk from Tribe29, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected Checkmk versions: 2.0.0 through 2.0.0p27; 2.1.0 through 2.1.0p6; 1.6.0 through 1.6.0p30. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Checkmk you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on checkmk.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Tribe29 | Checkmk | 2.0.0 through 2.0.0p27; 2.1.0 through 2.1.0p6; 1.6.0 through 1.6.0p30 | 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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- 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:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA (checkmk.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Broad access controls could allow site users to directly interact with the system Apache installation when providing the reverse proxy configurations for Tribe29's Checkmk <= 2.1.0p6, Checkmk <= 2.0.0p27, and all versions of Checkmk 1.6.0 (EOL) allowing an attacker to perform remote code execution with root privileges on the underlying host.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Inclusion of Functionality from Untrusted Control Sphere
The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.
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.
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs. For example, ID 1 could map to inbox.txt and ID 2 could map to profile.txt. Features such as the ESAPI AccessReferenceMap provide this capability.
- 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 Inclusion of Functionality from Untrusted Control Sphere vulnerabilities (CWE-829)
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
- checkmk.com/werk/14281Mitigation
Other vulnerabilities in Checkmk
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 7.8 High severity
- 8.8 High severity
- 7.5 High severity
Recent Inclusion of Functionality from Untrusted Control Sphere vulnerabilities
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
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