Msi Package Builder: Download of Code Without Integrity Check
CVE-2022-28944 is a high-severity download of code without integrity check vulnerability in Msi Package Builder from Emcosoftware, 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 Msi Package Builder versions: 9.1.4. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.6% chance of exploitation within 30 days, higher than 76% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Msi Package Builder you run against the affected versions below, and install the vendor's latest release.
- 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 |
|---|---|---|---|
| Emcosoftware | Msi Package Builder | 9.1.4 | Not stated |
| Emcosoftware | Network Inventory | 5.8.22 | Not stated |
| Emcosoftware | Network Software Scanner | 2.0.8 | Not stated |
| Emcosoftware | Ping Monitor | 8.0.18 | Not stated |
| Emcosoftware | Remote Installer | 6.0.13 | Not stated |
| Emcosoftware | Remote Shutdown | 7.2.2 | Not stated |
| Emcosoftware | Unlock It | 6.1.1 | Not stated |
| Emcosoftware | Wakeonlan | 2.0.8 | Not stated |
Version data comes from NVD's product matching. 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 | 6.8 | Medium | NVD |
Official description
Certain EMCO Software products are affected by: CWE-494: Download of Code Without Integrity Check. This affects MSI Package Builder for Windows 9.1.4 and Remote Installer for Windows 6.0.13 and Ping Monitor for Windows 8.0.18 and Remote Shutdown for Windows 7.2.2 and WakeOnLan 2.0.8 and Network Inventory for Windows 5.8.22 and Network Software Scanner for Windows 2.0.8 and UnLock IT for Windows 6.1.1. The impact is: execute arbitrary code (remote). The component is: Updater. The attack vector is: To exploit this vulnerability, a user must trigger an update of an affected installation of EMCO Software. ¶¶ Multiple products from EMCO Software are affected by a remote code execution vulnerability during the update process.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Download of Code Without Integrity Check
The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code.
How developers prevent this class of flaw
- Perform proper forward and reverse DNS lookups to detect DNS spoofing.
- Encrypt the code with a reliable encryption scheme before transmitting.
- Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
More Download of Code Without Integrity Check vulnerabilities (CWE-494)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- github.com/gerr-re/cve-2022-28944/blob/main/cve-2022-28944_public-advisory.pdfExploit, Third Party Advisory
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