[Bug 236870] libarchive directory traversal gives spurious permission errors
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Fri Mar 29 05:57:02 UTC 2019
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236870
Bug ID: 236870
Summary: libarchive directory traversal gives spurious
permission errors
Product: Base System
Version: 12.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: bugs at FreeBSD.org
Reporter: andrew at tao11.riddles.org.uk
Created attachment 203232
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=203232&action=edit
libarchive directory traversal patch
libarchive-based utilities, notably including tar(1), fail if told to traverse
"." if the parent directory is not readable. This is caused by libarchive
trying to open ".." at the end of the traverse in order to exit the directory,
which is an obviously wrong thing to do.
Attached patch (against 12-stable) fixes this and includes a test case.
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