VDB-144538 · CVE-2019-8794 · HT210721

Apple iOS/iPadOS up to 13.1.3 Kernel Memory input validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Apple iOS and iPadOS up to 13.1.3. This impacts an unknown function of the component Kernel. Executing a manipulation can lead to input validation (Memory). This vulnerability appears as CVE-2019-8794. The attack requires local access. In addition, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iOS and iPadOS up to 13.1.3 (Smartphone Operating System). It has been declared as problematic. This vulnerability affects some unknown functionality of the component Kernel. The manipulation with an unknown input leads to a input validation vulnerability (Memory). The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. CVE summarizes:

A validation issue was addressed with improved input sanitization. This issue is fixed in iOS 13.2 and iPadOS 13.2, macOS Catalina 10.15.1, tvOS 13.2, watchOS 6.1. An application may be able to read restricted memory.

The weakness was presented 10/28/2019 by 08Tc3wBB as HT210721 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2019-8794. Local access is required to approach this attack. A single authentication is required for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

A validation issue was addressed with improved input sanitization.

A public exploit has been developed by 08Tc3wBB in Objective-C and been published 2 weeks after the advisory. It is possible to download the exploit at github.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k.

Upgrading to version 13.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See VDB-144512, VDB-144528, VDB-144529 and VDB-144530 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

Version

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Input validation / Memory
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: 08Tc3wBB
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS/iPadOS 13.2

Timelineinfo

02/18/2019 🔍
10/28/2019 +252 days 🔍
10/28/2019 +0 days 🔍
10/31/2019 +3 days 🔍
11/11/2019 +11 days 🔍
01/31/2024 +1542 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT210721
Researcher: 08Tc3wBB
Status: Confirmed

CVE: CVE-2019-8794 (🔍)
GCVE (CVE): GCVE-0-2019-8794
GCVE (VulDB): GCVE-100-144538
scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 10/31/2019 07:38
Updated: 01/31/2024 08:28
Changes: 10/31/2019 07:38 (47), 11/12/2019 07:29 (21), 11/12/2019 07:30 (2), 01/31/2024 08:28 (7)
Complete: 🔍
Committer: misc
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.