Apple iOS up to 7.0.5 SSL SSLVerifySignedServerKeyExchange Common Name Field goto fail input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple iOS up to 7.0.5. The affected element is the function SSLVerifySignedServerKeyExchange of the component SSL Handler. Executing a manipulation as part of Common Name Field can lead to input validation (goto fail). This vulnerability is registered as CVE-2014-1266. Furthermore, an exploit is available. This vulnerability has historical importance owing to its background and reception. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple iOS up to 7.0.5 (Smartphone Operating System) and classified as critical. This vulnerability affects the function SSLVerifySignedServerKeyExchange of the component SSL Handler. The manipulation as part of a Common Name Field leads to a input validation vulnerability (goto fail). 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, and integrity. CVE summarizes:

The SSLVerifySignedServerKeyExchange function in libsecurity_ssl/lib/sslKeyExchange.c in the Secure Transport feature in the Data Security component in Apple iOS 6.x before 6.1.6 and 7.x before 7.0.6, Apple TV 6.x before 6.0.2, and Apple OS X 10.9.x before 10.9.2 does not check the signature in a TLS Server Key Exchange message, which allows man-in-the-middle attackers to spoof SSL servers by (1) using an arbitrary private key for the signing step or (2) omitting the signing step.

The weakness was published 02/21/2014 with Apple as HT6147 as confirmed advisory (Website). The advisory is available at support.apple.com. The public release has been coordinated with the vendor. This vulnerability was named CVE-2014-1266 since 01/08/2014. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/09/2021). It is expected to see the exploit prices for this product increasing in the near future.This vulnerability has a historic impact due to its background and reception. Responsible for the vulnerability is the following code: 

if ((err = SSLHashSHA1.update(&hashCtx, &serverRandom)) != 0)
   goto fail;
if ((err = SSLHashSHA1.update(&hashCtx, &signedParams)) != 0)
   goto fail;
   goto fail;
if ((err = SSLHashSHA1.final(&hashCtx, &hashOut)) != 0)
   goto fail;

It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 72687 (Mac OS X 10.9.x < 10.9.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 121815 (Apple Mac OS X v10.9.2 and Security Update 2014-001 Not Installed (APPLE-SA-2014-02-25-1)). ZDNet mentions: "There is speculation that this vulnerability, coupled with automatic updates over SSL, may have been one of the ways that the NSA could access "any iOS device" — a claim made in leaked Snowden-NSA documents, one that Apple vehemently denied."

Upgrading to version 6.1.6 or 7.0.6 eliminates this vulnerability. The upgrade is hosted for download at support.apple.com. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Secure Transport failed to validate the authenticity of the connection. This issue was addressed by restoring missing validation steps.
Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13769.

The vulnerability is also documented in the databases at X-Force (91367), Tenable (72687), SecurityFocus (BID 65738†), OSVDB (103583†) and Secunia (SA57061†). Additional details are provided at zdnet.com. Similar entries are available at VDB-10324, VDB-10922, VDB-10909 and VDB-10897. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Reliability: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 72687
Nessus Name: Mac OS X 10.9.x < 10.9.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS 6.1.6/7.0.6
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

01/08/2014 🔍
02/21/2014 +44 days 🔍
02/21/2014 +0 days 🔍
02/21/2014 +0 days 🔍
02/21/2014 +0 days 🔍
02/21/2014 +0 days 🔍
02/22/2014 +1 days 🔍
02/22/2014 +0 days 🔍
02/23/2014 +1 days 🔍
02/24/2014 +1 days 🔍
06/09/2021 +2662 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT6147
Organization: Apple
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-1266 (🔍)
GCVE (CVE): GCVE-0-2014-1266
GCVE (VulDB): GCVE-100-12370

IAVM: 🔍

X-Force: 91367 - Apple iOS SSL/TLS spoofing, Medium Risk
SecurityFocus: 65738 - Apple iOS And TV Secure Transport Connection Validation Security Bypass Vulnerability
Secunia: 57061 - Apple iOS SSL/TLS Spoofing Vulnerability, Less Critical
OSVDB: 103583
SecurityTracker: 1029811 - Apple iOS SSL/TLS Authentication Flaw Lets Remote Users Decrypt SSL/TLS Traffic
Vulnerability Center: 43367 - Apple iOS 6,7 Apple TV and Apple OS X Remote SSL Spoofing Vulnerability in Secure Transport Feature, Medium

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

Entryinfo

Created: 02/22/2014 20:14
Updated: 06/09/2021 16:47
Changes: 02/22/2014 20:14 (107), 05/21/2017 14:22 (3), 06/09/2021 16:47 (3)
Complete: 🔍
Cache ID: 216:3E2:103

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

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