A Firewall Rule which allows all incoming TCP connections to all programs from any source and…
CVE-2022-43516 is a critical-severity vulnerability in Zabbix agent (MSI packages) from Zabbix, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Zabbix agent (MSI packages) versions: Oct. 29, 2022 - Dec 2, 2022. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1% chance of exploitation within 30 days, higher than 63% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Zabbix to 6.0.12 or 6.2.6, whichever matches your release line, or a later version.
- Read the advisory on support.zabbix.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 |
|---|---|---|---|
| Zabbix | Zabbix agent (MSI packages) | Oct. 29, 2022 - Dec 2, 2022 | Not stated |
| Zabbix | Zabbix agent 2 (MSI packages) | Oct. 29, 2022 - Dec 2, 2022 | Not stated |
| Microsoft | Windows Firewall | Not specified in the record | Not stated |
| Zabbix | Zabbix | 6.0.10 up to, but not including, 6.0.12; 6.2.0 up to, but not including, 6.2.6; 6.0.12; 6.2.6 | 6.0.12, 6.2.6 |
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
- 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:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.5 | Medium | CNA (zabbix.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
A Firewall Rule which allows all incoming TCP connections to all programs from any source and to all ports is created in Windows Firewall after Zabbix agent installation (MSI)
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
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