Mailinspector: Path Traversal: '..filename'
CVE-2024-34470 is a high-severity path traversal: '..filename' vulnerability in Mailinspector from Hsc, with a CVSS 3.1 base score of 8.6 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 6.7% chance of exploitation within 30 days, which is in the top 5.98% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Mailinspector 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 |
|---|---|---|---|
| Hsc | Mailinspector | Not specified in the record | 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
- NoneNo account or login is needed.
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N. Scored by CISA (ADP).
Official description
An issue was discovered in HSC Mailinspector 5.2.17-3 through v.5.2.18. An Unauthenticated Path Traversal vulnerability exists in the /public/loader.php file. The path parameter does not properly filter whether the file and directory passed are part of the webroot, allowing an attacker to read arbitrary files on the server.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Path Traversal: '..filename'
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '..filename' (leading backslash dot dot) sequences that can resolve to a location that is outside of that directory.
How developers prevent this class of flaw
- Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- github.com/osvaldotenorio/CVE-2024-34470Exploit, Third Party Advisory
Other vulnerabilities in Mailinspector
- 7.5 High severity
- 9.8 Critical severity
Recent Path Traversal: '..filename' vulnerabilities
- 9.9 Critical severity
- 7.5 High severity
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