Netatalk: Access of Resource Using Incompatible Type
CVE-2023-42464 is a critical-severity access of resource using incompatible type vulnerability in Netatalk, 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. The record lists version 3.1.17 as the first without the flaw, so updating Netatalk to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.1% chance of exploitation within 30 days, higher than 82% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Netatalk to 3.1.17 or a later version.
- Read the advisory on github.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 |
|---|---|---|---|
| Netatalk | Netatalk | 3.1 up to, but not including, 3.1.17 | 3.1.17 |
| Debian | Debian Linux | 10.0; 11.0 | 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
A Type Confusion vulnerability was found in the Spotlight RPC functions in afpd in Netatalk 3.1.x before 3.1.17. When parsing Spotlight RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the underlying protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a malicious actor may be able to fully control the value of the pointer and theoretically achieve Remote Code Execution on the host. This issue is similar to CVE-2023-34967.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- lists.debian.org/debian-lts-announce/2023/09/msg00031.htmlMailing List, Third Party Advisory
- debian.org/security/2023/dsa-5503Third Party Advisory
Other references
Other vulnerabilities in Netatalk
- 7.5 High severity
- 7.5 High severity
- 7.6 High severity
- 7.1 High severity
- 7.1 High severity
- 7.5 High severity
Recent Access of Resource Using Incompatible Type vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 8.8 High severity
Google Chromium V8 Type Confusion Exploited
- 8.8 High severity
- 8.8 High severity
- 7.8 High severity
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