Apple Mac OS X up to 10.9.3 Code Signing cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Apple Mac OS X up to 10.9.3. Affected by this vulnerability is an unknown functionality of the component Code Signing Handler. This manipulation causes cryptographic issue. This vulnerability is registered as CVE-2014-4391. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple Mac OS X up to 10.9.3 (Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component Code Signing Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Code Signing feature in Apple OS X before 10.10 does not properly handle incomplete resource envelopes in signed bundles, which allows remote attackers to bypass intended app-author restrictions by omitting an execution-related resource.

The weakness was published 10/16/2014 by Christopher Hickstein with Apple as HT6535 as confirmed advisory (Website) via ZDI (Zero Day Initiative). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2014-4391 since 06/20/2014. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK. The advisory points out:

Apps signed on OS X prior to OS X Mavericks 10.9 or apps using custom resource rules, may have been susceptible to tampering that would not have invalidated the signature. On systems set to allow only apps from the Mac App Store and identified developers, a downloaded modified app could have been allowed to run as though it were legitimate. This issue was addressed by ignoring signatures of bundles with resource envelopes that omit resources that may influence execution.

The vulnerability scanner Nessus provides a plugin with the ID 78550 (Mac OS X < 10.10 Multiple Vulnerabilities (POODLE) (Shellshock)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks.

Upgrading to version 10.10 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (97644), Tenable (78550), SecurityFocus (BID 70637†), SecurityTracker (ID 1031063†) and Vulnerability Center (SBV-46697†). Similar entries are available at VDB-10344, VDB-67593, VDB-67592 and VDB-67590. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CPE 2.3info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 78550
Nessus Name: Mac OS X < 10.10 Multiple Vulnerabilities (POODLE) (Shellshock)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Mac OS X 10.10

Timelineinfo

06/20/2014 🔍
10/16/2014 +118 days 🔍
10/16/2014 +0 days 🔍
10/16/2014 +0 days 🔍
10/17/2014 +1 days 🔍
10/17/2014 +0 days 🔍
10/17/2014 +0 days 🔍
10/17/2014 +0 days 🔍
10/19/2014 +2 days 🔍
02/23/2022 +2684 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT6535
Researcher: Christopher Hickstein
Organization: Apple
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-4391 (🔍)
GCVE (CVE): GCVE-0-2014-4391
GCVE (VulDB): GCVE-100-68035
X-Force: 97644
SecurityFocus: 70637 - Apple Mac OS X CVE-2014-4391 Security Bypass Vulnerability
SecurityTracker: 1031063 - Apple OS X Multiple Flaws Let Users Execute Arbitrary Code, Obtain Elevated Privileges, Bypass Security Restrictions, and Obtain Potentially Sensitive Information
Vulnerability Center: 46697 - Apple OS X Before 10.10 Remote Security Bypass due to an Error in the Code Signing Feature, Medium

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 10/17/2014 10:22
Updated: 02/23/2022 14:27
Changes: 10/17/2014 10:22 (70), 06/09/2017 07:19 (11), 02/23/2022 14:27 (4)
Complete: 🔍
Cache ID: 216:9BA:103

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