Xamarin Studio for Mac API documentation update affected by local privilege escalation

["Securify B.V. via Fulldisclosure" <fulldisclosure () seclists org>]

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Xamarin Studio for Mac API documentation update affected by local
privilege escalation
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Yorick Koster, April 2017

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Abstract
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Xamarin Studio is an Integrated Development Environment (IDE) used to
create iOS, Mac and Android applications. Xamarin Studio supports
developments in C# and F# (by default). The API documentation update
mechanism of Xamarin Studio for Mac is installed as setuid root. This
update mechanism contains several flaws that could be leveraged by a
local attacker to gain elevated (root) privileges.

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See also
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- CVE-2017-8665
- 
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8665

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Tested versions
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This issue was successfully verified on Xamarin Studio for Mac version
6.2.1 (build 3) and version 6.3 (build 863).

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Fix
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Microsoft released a new version of Xamarin.iOS that addresses this
issue:
https://support.microsoft.com/en-us/help/4037359

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Details
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https://www.securify.nl/advisory/SFY20170403/xamarin-studio-for-mac-api-documentation-update-affected-by-local-privilege-escalation.html

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