Apple iOS up to 4.1 Emergency Calls Lock Screen race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple iOS up to 4.1. It has been classified as problematic. The affected element is an unknown function of the component Emergency Calls Lock Screen. This manipulation with the input Emergency Call / #### / Call / Lock Key causes race condition. The identification of this vulnerability is CVE-2010-4012. The attack can only be executed locally. Furthermore, there is an exploit available. This vulnerability is considered historic because of its background and reception. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple iOS up to 4.1 (Smartphone Operating System). It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Emergency Calls Lock Screen. The manipulation with the input value Emergency Call / #### / Call / Lock Key leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

Race condition in Apple iOS 4.0 through 4.1 for iPhone 3G and later allows physically proximate attackers to bypass the passcode lock by making a call from the Emergency Call screen, then quickly pressing the Sleep/Wake button.

The issue has been introduced in 06/21/2010. The weakness was shared 10/27/2010 by jordand321 as not defined posting (Website). It is possible to read the advisory at forums.macrumors.com. The vendor was not involved in the public release. This vulnerability is known as CVE-2010-4012 since 10/20/2010. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/08/2018). It is expected to see the exploit prices for this product increasing in the near future.Due to its background and reception, this vulnerability has a historic impact.

A public exploit has been developed by Salomão Filho. It is possible to download the exploit at vimeo.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 128 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version iOS 4.2 eliminates this vulnerability. The problem might be mitigated by replacing the product with Android, Windows Phone or BlackBerry as an alternative. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (64384), SecurityFocus (BID 44419†), OSVDB (68928†), Secunia (SA41977†) and Vulnerability Center (SBV-47784†). Additional details are provided at scip.ch. The entries VDB-55549, VDB-55548, VDB-55547 and VDB-55545 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.7
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Salomão Filho
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: iOS iOS 4.2
Alternative: Android/Windows Phone/BlackBerry

Timelineinfo

06/21/2010 🔍
10/20/2010 +121 days 🔍
10/22/2010 +2 days 🔍
10/22/2010 +0 days 🔍
10/26/2010 +4 days 🔍
10/27/2010 +0 days 🔍
10/27/2010 +0 days 🔍
11/19/2010 +23 days 🔍
12/08/2010 +19 days 🔍
12/23/2014 +1476 days 🔍
10/08/2018 +1385 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: forums.macrumors.com
Researcher: jordand321
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-4012 (🔍)
GCVE (CVE): GCVE-0-2010-4012
GCVE (VulDB): GCVE-100-4219
X-Force: 64384
SecurityFocus: 44419 - Apple iPhone Lock Screen Security Bypass Vulnerability
Secunia: 41977 - Apple iOS Emergency Call Passcode Lock Security Bypass Weakness, Not Critical
OSVDB: 68928 - Apple iPhone iOS Screen Lock Bypass
Vulnerability Center: 47784 - Apple iOS 4.0 - 4.1 for iPhone 3G and Later Local Restrictions Bypass Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20150917
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 11/19/2010 01:00
Updated: 10/08/2018 14:55
Changes: 11/19/2010 01:00 (86), 10/08/2018 14:55 (5)
Complete: 🔍
Cache ID: 216::103

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