Msnswitch Firmware: Improper Authentication
CVE-2022-32429 is a critical-severity improper authentication vulnerability in Msnswitch Firmware from Megatech, 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 Msnswitch Firmware versions: mnt.2408. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 75.9% chance of exploitation within 30 days, which is in the top 0.47% of all scored CVEs.
Exploitation in the next 30 days is more likely than not, according to EPSS.
What to do
- Check which version of Msnswitch Firmware 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.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Megatech | Msnswitch Firmware | mnt.2408 | 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
- 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.
Official description
An authentication-bypass issue in the component http://MYDEVICEIP/cgi-bin-sdb/ExportSettings.sh of Mega System Technologies Inc MSNSwitch MNT.2408 allows unauthenticated attackers to arbitrarily configure settings within the application, leading to remote code execution.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- packetstormsecurity.com/files/169819/MSNSwitch-Firmware-MNT.2408-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- elifulkerson.com/CVE-2022-32429/Exploit, Third Party Advisory
Recent Improper Authentication vulnerabilities
- 7.1 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 7.5 High severity
- 9.8 Critical severity
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