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69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
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From 3a629609084d147838368262171b923f0770e564 Mon Sep 17 00:00:00 2001
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From: Tony Cook <tony@develop-help.com>
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Date: Tue, 15 Dec 2015 10:56:54 +1100
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Subject: ensure File::Spec::canonpath() preserves taint
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Previously the unix specific XS implementation of canonpath() would
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return an untainted path when supplied a tainted path.
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For the empty string case, newSVpvs() already sets taint as needed on
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its result.
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This issue was assigned CVE-2015-8607.
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Bug: https://rt.perl.org/Ticket/Display.html?id=126862
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Bug-Debian: https://bugs.debian.org/810719
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Origin: upstream
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Patch-Name: fixes/CVE-2015-8607_file_spec_taint_fix.diff
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---
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dist/PathTools/Cwd.xs | 1 +
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dist/PathTools/t/taint.t | 19 ++++++++++++++++++-
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2 files changed, 19 insertions(+), 1 deletion(-)
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diff --git a/dist/PathTools/Cwd.xs b/dist/PathTools/Cwd.xs
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index 9d4dcf0..3d018dc 100644
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--- a/dist/PathTools/Cwd.xs
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+++ b/dist/PathTools/Cwd.xs
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@@ -535,6 +535,7 @@ THX_unix_canonpath(pTHX_ SV *path)
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*o = 0;
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SvPOK_on(retval);
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SvCUR_set(retval, o - SvPVX(retval));
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+ SvTAINT(retval);
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return retval;
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}
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diff --git a/dist/PathTools/t/taint.t b/dist/PathTools/t/taint.t
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index 309b3e5..48f8c5b 100644
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--- a/dist/PathTools/t/taint.t
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+++ b/dist/PathTools/t/taint.t
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@@ -12,7 +12,7 @@ use Test::More;
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BEGIN {
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plan(
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${^TAINT}
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- ? (tests => 17)
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+ ? (tests => 21)
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: (skip_all => "A perl without taint support")
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);
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}
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@@ -34,3 +34,20 @@ foreach my $func (@Functions) {
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# Previous versions of Cwd tainted $^O
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is !tainted($^O), 1, "\$^O should not be tainted";
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+
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+{
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+ # [perl #126862] canonpath() loses taint
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+ my $tainted = substr($ENV{PATH}, 0, 0);
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+ # yes, getcwd()'s result should be tainted, and is tested above
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+ # but be sure
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+ ok tainted(File::Spec->canonpath($tainted . Cwd::getcwd)),
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+ "canonpath() keeps taint on non-empty string";
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+ ok tainted(File::Spec->canonpath($tainted)),
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+ "canonpath() keeps taint on empty string";
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+
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+ (Cwd::getcwd() =~ /^(.*)/);
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+ my $untainted = $1;
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+ ok !tainted($untainted), "make sure our untainted value is untainted";
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+ ok !tainted(File::Spec->canonpath($untainted)),
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+ "canonpath() doesn't add taint to untainted string";
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+}
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