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Safari CVE-2024-27834

MEDIUM
Insecure Inherited Permissions (CWE-277)
2024-05-14 product-security@apple.com
Authentication Bypass Apple macOS Fedora Ipados Iphone Os Safari Tvos Watchos Webkitgtk Wpe Webkit Fedoraproject Wpewebkit
5.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-277
ASVS 5.0
V8 - Authorization Insecure inherited permissions
Impact

CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.01%.
Exploit ScenarioDerived

Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAI

The issue was addressed with improved checks. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-277. The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication. Affected products include: Apple Safari, Apple Ipados, Apple Iphone Os, Apple Macos, Apple Tvos.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

2
PoC Detected
Apr 02, 2026 - 19:17 vuln.today
Public exploit code
CVE Published
May 14, 2024 - 15:13 nvd
MEDIUM 5.5

DescriptionCVE.org

The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

Threat Intelligence Overview

EPSS Score
0.0%
Top 99% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*
cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*

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Same weakness CWE-277 – Insecure Inherited Permissions

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CVE-2024-27822 HIGH POC
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CVE-2024-36540 CRITICAL
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CVE-2024-36539 CRITICAL
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CVE-2021-24031 MEDIUM POC
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CVE-2018-25111 MEDIUM POC
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Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC
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CVE-2023-22515 CRITICAL POC
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CVE-2012-4681 CRITICAL POC
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CVE-2013-2465 CRITICAL POC
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CVE-2011-3544 CRITICAL POC
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CVE-2022-40684 CRITICAL POC
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CVE-2025-61882 CRITICAL POC
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CVE-2024-0012 CRITICAL POC
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References

Advisories & patches
ADVISORY https://support.apple.com/en-us/HT214101 ADVISORY https://support.apple.com/en-us/HT214102 ADVISORY https://support.apple.com/en-us/HT214103 ADVISORY https://support.apple.com/en-us/HT214104 ADVISORY https://support.apple.com/en-us/HT214106 ADVISORY https://vuldb.com/vuln/264081 ADVISORY https://vuldb.com/vuln/264082 ADVISORY https://vuldb.com/vuln/264083 ADVISORY https://vuldb.com/vuln/264084 ADVISORY https://vuldb.com/vuln/264085 REF http://seclists.org/fulldisclosure/2024/May/10 REF http://seclists.org/fulldisclosure/2024/May/12 REF http://seclists.org/fulldisclosure/2024/May/16 REF http://seclists.org/fulldisclosure/2024/May/17 REF http://seclists.org/fulldisclosure/2024/May/9 REF http://www.openwall.com/lists/oss-security/2024/05/21/1 REF https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ADCLQW54XN37VJZNYD3UKCYATJFIMYXG/ REF https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WKIXADCW3O4R2OOSDZGPU55XQFE6NA3M/ REF https://support.apple.com/en-us/120896 REF https://support.apple.com/en-us/120898 REF https://support.apple.com/en-us/120901 REF https://support.apple.com/en-us/120902 REF https://support.apple.com/en-us/120903 REF https://support.apple.com/en-us/120905 REF https://support.apple.com/kb/HT214100 REF https://support.apple.com/kb/HT214102 REF https://support.apple.com/kb/HT214104 REF https://support.apple.com/kb/HT214106

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