macOS: Access of Resource Using Incompatible Type
CVE-2022-42841 is a high-severity access of resource using incompatible type vulnerability in macOS from Apple, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists versions 11.7, 13.1, 12.6 as the first without the flaw, so updating macOS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.38% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update macOS to 11.7 or 13.1 or 12.6, whichever matches your release line, or a later version.
- Read the advisory on support.apple.com for workarounds and exact fixed builds.
- 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 |
|---|---|---|---|
| Apple | macOS | before 11.7; before 13.1; before 12.6 | 11.7, 13.1, 12.6 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- 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:L/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 | 7.8 | High | NVD |
| CVSS 3.1 | 7.8 | High | CISA (ADP) |
Official description
A type confusion issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.6.2, macOS Ventura 13.1, macOS Big Sur 11.7.2. Processing a maliciously crafted package may lead to arbitrary code execution.
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- support.apple.com/en-us/HT213532Release Notes
- support.apple.com/en-us/HT213533Release Notes
- support.apple.com/en-us/HT213534Release Notes
Third-party and government advisories
- seclists.org/fulldisclosure/2022/Dec/23Mailing List, Third Party Advisory
- seclists.org/fulldisclosure/2022/Dec/24Mailing List, Third Party Advisory
- seclists.org/fulldisclosure/2022/Dec/25Mailing List, Third Party Advisory
Other vulnerabilities in macOS
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Recent Access of Resource Using Incompatible Type vulnerabilities
- 8.8 High severity
Apple iOS Type Confusion Exploited
- 8.8 High severity
Google Chromium V8 Type Confusion Exploited
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Google Chromium V8 Type Confusion Exploited
- 8.8 High severity
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