VDB-97403 · CVE-2016-8507 · BID 96517

Yandex Browser for iOS up to 16.10 facetime:/ URL information disclosure

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.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Yandex Browser for iOS up to 16.10. It has been classified as critical. This impacts an unknown function of the component facetime:/ URL Handler. The manipulation leads to information disclosure. This vulnerability is listed as CVE-2016-8507. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Yandex Browser for iOS up to 16.10 (iOS App Software) and classified as critical. This issue affects an unknown code block of the component facetime:/ URL Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Yandex Browser for iOS before 16.10.0.2357 does not properly restrict processing of facetime:// URLs, which allows remote attackers to initiate facetime-call without user's approval and obtain video and audio data from a device via a crafted web site.

The bug was discovered 02/27/2017. The weakness was presented 03/01/2017 (Website). It is possible to read the advisory at yandex.com. The identification of this vulnerability is CVE-2016-8507 since 10/07/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 16.10.0.2357 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 96517†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

iOS App Software

Vendor

Yandex

Name

Browser for iOS

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: Browser for iOS 16.10.0.2357

Timelineinfo

10/07/2016 🔍
02/27/2017 +143 days 🔍
03/01/2017 +2 days 🔍
03/01/2017 +0 days 🔍
03/01/2017 +0 days 🔍
03/02/2017 +1 days 🔍
09/03/2020 +1281 days 🔍

Sourcesinfo

Advisory: yandex.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8507 (🔍)
GCVE (CVE): GCVE-0-2016-8507
GCVE (VulDB): GCVE-100-97403
SecurityFocus: 96517 - Yandex Browser CVE-2016-8507 Security Bypass Vulnerability
OSVDB: - CVE-2016-8507 - Yandex - Browser - Security Bypass Issue

Entryinfo

Created: 03/02/2017 09:54
Updated: 09/03/2020 08:22
Changes: 03/02/2017 09:54 (62), 09/03/2020 08:22 (5)
Complete: 🔍
Cache ID: 216:B02:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.