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37 lines
1.5 KiB
Diff
37 lines
1.5 KiB
Diff
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Fix CVE-2018-12015:
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https://security-tracker.debian.org/tracker/CVE-2018-12015
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12015
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https://rt.cpan.org/Ticket/Display.html?id=125523
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Patch taken from this upstream commit and adapted to apply to
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the bundled copy in the Perl distribution:
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https://github.com/jib/archive-tar-new/commit/ae65651eab053fc6dc4590dbb863a268215c1fc5
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diff --git a/cpan/Archive-Tar/lib/Archive/Tar.pm b/cpan/Archive-Tar/lib/Archive/Tar.pm
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index 6244369..a83975f 100644
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--- a/cpan/Archive-Tar/lib/Archive/Tar.pm
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+++ b/cpan/Archive-Tar/lib/Archive/Tar.pm
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@@ -845,6 +845,20 @@ sub _extract_file {
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return;
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}
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+ ### If a file system already contains a block device with the same name as
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+ ### the being extracted regular file, we would write the file's content
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+ ### to the block device. So remove the existing file (block device) now.
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+ ### If an archive contains multiple same-named entries, the last one
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+ ### should replace the previous ones. So remove the old file now.
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+ ### If the old entry is a symlink to a file outside of the CWD, the new
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+ ### entry would create a file there. This is CVE-2018-12015
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+ ### <https://rt.cpan.org/Ticket/Display.html?id=125523>.
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+ if (-l $full || -e _) {
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+ if (!unlink $full) {
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+ $self->_error( qq[Could not remove old file '$full': $!] );
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+ return;
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+ }
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+ }
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if( length $entry->type && $entry->is_file ) {
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my $fh = IO::File->new;
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$fh->open( $full, '>' ) or (
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