What is the severity of CVE-2015-5851?

CVE-2015-5851 has been classified as a medium severity vulnerability.

How do I fix CVE-2015-5851?

To mitigate CVE-2015-5851, upgrade to a version of iOS or macOS that is 9.0 or later.

What does CVE-2015-5851 exploit in iOS and macOS?

CVE-2015-5851 exploits the lack of encryption requirement in the Multipeer Connectivity component.

Who is affected by CVE-2015-5851?

Users of iOS versions prior to 9.0 and macOS versions up to 10.10.5 are affected by CVE-2015-5851.

What is an encrypted-to-unencrypted downgrade attack in relation to CVE-2015-5851?

An encrypted-to-unencrypted downgrade attack allows local users to access cleartext multipeer data due to the vulnerability in session encryption.

Vulnerability/
CVE-2015-5851

low

2.1

CWE

200

18/9/2015

6/8/2024

CVE-2015-5851: Infoleak

First published: Fri Sep 18 2015(Updated: )

The convenience initializer in the Multipeer Connectivity component in Apple iOS before 9 does not require an encrypted session, which allows local users to obtain cleartext multipeer data via an encrypted-to-unencrypted downgrade attack.

Credit: product-security@apple.com

Affected Software	Affected Version	How to fix
macOS Yosemite	<=10.10.5
Apple iPhone OS	<=8.4.1

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2015-5851?
CVE-2015-5851 has been classified as a medium severity vulnerability.
How do I fix CVE-2015-5851?
To mitigate CVE-2015-5851, upgrade to a version of iOS or macOS that is 9.0 or later.
What does CVE-2015-5851 exploit in iOS and macOS?
CVE-2015-5851 exploits the lack of encryption requirement in the Multipeer Connectivity component.
Who is affected by CVE-2015-5851?
Users of iOS versions prior to 9.0 and macOS versions up to 10.10.5 are affected by CVE-2015-5851.
What is an encrypted-to-unencrypted downgrade attack in relation to CVE-2015-5851?
An encrypted-to-unencrypted downgrade attack allows local users to access cleartext multipeer data due to the vulnerability in session encryption.

agent/type
agent/references
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/author
agent/weakness
agent/last-modified-date
agent/severity
agent/first-publish-date
agent/event
agent/description
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/apple
canonical/macos yosemite
version/macos yosemite/10.10.5
canonical/apple iphone os
version/apple iphone os/8.4.1

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Frequently Asked Questions

What is the severity of CVE-2015-5851?
CVE-2015-5851 has been classified as a medium severity vulnerability.
How do I fix CVE-2015-5851?
To mitigate CVE-2015-5851, upgrade to a version of iOS or macOS that is 9.0 or later.
What does CVE-2015-5851 exploit in iOS and macOS?
CVE-2015-5851 exploits the lack of encryption requirement in the Multipeer Connectivity component.
Who is affected by CVE-2015-5851?
Users of iOS versions prior to 9.0 and macOS versions up to 10.10.5 are affected by CVE-2015-5851.
What is an encrypted-to-unencrypted downgrade attack in relation to CVE-2015-5851?
An encrypted-to-unencrypted downgrade attack allows local users to access cleartext multipeer data due to the vulnerability in session encryption.