VDB-115540 · CVE-2017-13863 · GCVE-0-2017-13863

Apple iOS up to 10.x APNs certificate 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.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Apple iOS up to 10.x. The impacted element is an unknown function of the component APNs. Executing a manipulation can lead to certificate validation. This vulnerability is registered as CVE-2017-13863. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple iOS up to 10.x (Smartphone Operating System). It has been declared as critical. This vulnerability affects an unknown code block of the component APNs. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in certain Apple products. iOS before 11 is affected. The issue involves the "APNs" component. It allows man-in-the-middle attackers to track users by leveraging the transmission of client certificates.

The bug was discovered 09/19/2017. The weakness was published 04/03/2018 (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2017-13863 since 08/30/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/20/2020). It is expected to see the exploit prices for this product increasing in the near future.The MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability was handled as a non-public zero-day exploit for at least 196 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 11.0 eliminates this vulnerability.

Similar entries are available at VDB-102678, VDB-107049, VDB-107050 and VDB-107051. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

Version

10.x

License

commercial

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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: 🔍

0-Day Time: 🔍

Upgrade: iOS 11.0

Timelineinfo

08/30/2017 🔍
09/19/2017 +20 days 🔍
04/03/2018 +196 days 🔍
04/03/2018 +0 days 🔍
04/03/2018 +0 days 🔍
01/20/2020 +657 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-13863 (🔍)
GCVE (CVE): GCVE-0-2017-13863
GCVE (VulDB): GCVE-100-115540
scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 04/03/2018 14:43
Updated: 01/20/2020 11:13
Changes: 04/03/2018 14:43 (62), 01/20/2020 11:13 (2)
Complete: 🔍
Cache ID: 216::103