iOS and iPadOS: Missing Support for Integrity Check
CVE-2024-27817 is a high-severity missing support for integrity check vulnerability in iOS and iPadOS 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 16.7.8, 17.5 as the first without the flaw, so updating iOS and iPadOS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.18% 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 iOS and iPadOS to 16.7.8 or 17.5, whichever matches your release line, or a later version.
- Update macOS to 12.7.5 or 13.6.7 or 14.5, whichever matches your release line, or a later version.
- Update tvOS to 17.5 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 | iOS and iPadOS | before 16.7.8; before 17.5 | 16.7.8, 17.5 |
| Apple | macOS | before 12.7.5; before 13.6.7; before 14.5 | 12.7.5, 13.6.7, 14.5 |
| Apple | tvOS | before 17.5 | 17.5 |
| Apple | visionOS | before 1.2 | 1.2 |
| Apple | iphone_os | before 17.5; before 16.7 | 17.5, 16.7 |
| Apple | ipad_os | before 17.5; before 16.7 | 17.5, 16.7 |
| Apple | mac_os | 14.0 up to, but not including, 14.5; 13.0 up to, but not including, 13.6; 12.0 up to, but not including, 12.7 | 14.5, 13.6, 12.7 |
| Apple | iPadOS | before 16.7.8; 17.0 up to, but not including, 17.5 | 16.7.8, 17.5 |
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
The issue was addressed with improved checks. This issue is fixed in iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Monterey 12.7.5, macOS Sonoma 14.5, macOS Ventura 13.6.7, tvOS 17.5, visionOS 1.2. An app may be able to execute arbitrary code with kernel privileges.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Support for Integrity Check
The product uses a transmission protocol that does not include a mechanism for verifying the integrity of the data during transmission, such as a checksum.
How developers prevent this class of flaw
- Add an appropriately sized checksum to the protocol, ensuring that data received may be simply validated before it is parsed and used.
- Ensure that the checksums present in the protocol design are properly implemented and added to each message before it is sent.
More Missing Support for Integrity Check vulnerabilities (CWE-353)
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/HT214100
- support.apple.com/en-us/HT214101
- support.apple.com/en-us/HT214102
- support.apple.com/en-us/HT214105
- support.apple.com/en-us/HT214106
- support.apple.com/en-us/HT214107
- support.apple.com/en-us/HT214108
- support.apple.com/kb/HT214100
- support.apple.com/kb/HT214101
- support.apple.com/kb/HT214102
- support.apple.com/kb/HT214105
- support.apple.com/kb/HT214106
- support.apple.com/kb/HT214107
- support.apple.com/kb/HT214108
Third-party and government advisories
- seclists.org/fulldisclosure/2024/Jun/5Mailing List, Third Party Advisory
Other references
Other vulnerabilities in iOS and iPadOS
- 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 Missing Support for Integrity Check vulnerabilities
- 7.6 High severity
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