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Merge pull request #5987 from Bond-009/ioob

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PathExtensions: Fix index out of bounds in TryReplaceSubPath
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Bond-009 2021-05-05 17:20:14 +02:00 committed by GitHub
commit a6ee4632ce
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2 changed files with 9 additions and 2 deletions
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10
Emby.Server.Implementations/Library/PathExtensions.cs
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@ -96,8 +96,14 @@ namespace Emby.Server.Implementations.Library
// We have to ensure that the sub path ends with a directory separator otherwise we'll get weird results
// when the sub path matches a similar but in-complete subpath
var oldSubPathEndsWithSeparator = subPath[^1] == newDirectorySeparatorChar;
if (!path.StartsWith(subPath, StringComparison.OrdinalIgnoreCase)
|| (!oldSubPathEndsWithSeparator && path[subPath.Length] != newDirectorySeparatorChar))
if (!path.StartsWith(subPath, StringComparison.OrdinalIgnoreCase))
{
return false;
}
if (path.Length > subPath.Length
&& !oldSubPathEndsWithSeparator
&& path[subPath.Length] != newDirectorySeparatorChar)
{
return false;
}

1
tests/Jellyfin.Server.Implementations.Tests/Library/PathExtensionsTests.cs
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@ -33,6 +33,7 @@ namespace Jellyfin.Server.Implementations.Tests.Library
[InlineData("C:\\Users\\jeff\\myfile.mkv", "C:\\Users/jeff", "/home/jeff/", "/home/jeff/myfile.mkv")]
[InlineData("C:\\Users\\jeff\\myfile.mkv", "C:\\Users/jeff/", "/home/jeff/", "/home/jeff/myfile.mkv")]
[InlineData("C:\\Users\\jeff\\myfile.mkv", "C:\\Users/jeff/", "/", "/myfile.mkv")]
[InlineData("/o", "/o", "/s", "/s")] // regression test for #5977
public void TryReplaceSubPath_ValidArgs_Correct(string path, string subPath, string newSubPath, string? expectedResult)
{
Assert.True(PathExtensions.TryReplaceSubPath(path, subPath, newSubPath, out var result));