forked from lix-project/lix
* In the checker, do traversals of the dependency graph explicitly. A
conditional expression in the blacklist can specify when to
continue/stop a traversal. For example, in
<condition>
<within>
<traverse>
<not><hasAttr name='outputHash' value='.+' /></not>
</traverse>
<hasAttr name='outputHash' value='ef1cb003448b4a53517b8f25adb12452' />
</within>
</condition>
we traverse the dependency graph, not following the dependencies of
`fetchurl' derivations (as indicated by the presence of an
`outputHash' attribute - this is a bit ugly). The resulting set of
paths is scanned for a fetch of a file with the given hash, in this
case, the hash of zlib-1.2.1.tar.gz (which has a security bug). The
intent is that a dependency on zlib is not a problem if it is in a
`fetchurl' derivation, since that's build-time only. (Other
build-time uses of zlib *might* be a problem, e.g., static linking.)
This commit is contained in:
Eelco Dolstra
parent
bfbc55cbc6
commit
97c93526da
|
|
@ -1,32 +1,28 @@
|
|||
<blacklist>
|
||||
|
||||
|
||||
<!--
|
||||
<item id='openssl-0.9.7d-obsolete'>
|
||||
<condition>
|
||||
<containsSource
|
||||
hash="sha256:1xf1749gdfw9f50mxa5rsnmwiwrb5mi0kg4siw8a73jykdp2i6ii"
|
||||
origin="openssl-0.9.7d.tar.gz" />
|
||||
<within>
|
||||
<traverse><true /></traverse>
|
||||
<hasAttr name='outputHash' value='1b49e90fc8a75c3a507c0a624529aca5' />
|
||||
</within>
|
||||
</condition>
|
||||
<reason>
|
||||
Race condition in CRL checking code. Upgrade to 0.9.7e.
|
||||
</reason>
|
||||
<severity class="all" level="low" />
|
||||
</item>
|
||||
-->
|
||||
|
||||
|
||||
<item id='zlib-1.2.1-security' type='security'>
|
||||
<condition>
|
||||
<containsSource
|
||||
hash="sha256:1xf1749gdfw9f50mxa5rsnmwiwrb5mi0kg4siw8a73jykdp2i6ii"
|
||||
origin="openssl-0.9.7d.tar.gz" />
|
||||
<!-- <within>
|
||||
<within>
|
||||
<traverse>
|
||||
<not><hasName name='*.tar.*' /></not>
|
||||
<not><hasAttr name='outputHash' value='.+' /></not>
|
||||
</traverse>
|
||||
<hasAttr name='md5' value='ef1cb003448b4a53517b8f25adb12452' />
|
||||
</within> -->
|
||||
<hasAttr name='outputHash' value='ef1cb003448b4a53517b8f25adb12452' />
|
||||
</within>
|
||||
</condition>
|
||||
<reason>
|
||||
Zlib 1.2.1 is vulnerable to a denial-of-service condition. See
|
||||
|
|
|
|||
|
|
@ -26,40 +26,86 @@ my @userEnvElems = split ' ', $userEnvElems;
|
|||
my %storePathHashes;
|
||||
|
||||
|
||||
# Function for evaluating conditions.
|
||||
sub evalCondition {
|
||||
my $storePaths = shift;
|
||||
my $condition = shift;
|
||||
|
||||
my $name = $condition->getName;
|
||||
|
||||
if ($name eq "containsSource") {
|
||||
my $hash = $condition->attributes->getNamedItem("hash")->getValue;
|
||||
foreach my $path (keys %{$storePathHashes{$hash}}) {
|
||||
# !!! use a hash for $storePaths
|
||||
foreach my $path2 (@{$storePaths}) {
|
||||
return 1 if $path eq $path2;
|
||||
sub getElemNodes {
|
||||
my $node = shift;
|
||||
my @elems = ();
|
||||
foreach my $node ($node->getChildNodes) {
|
||||
push @elems, $node if $node->nodeType == XML_ELEMENT_NODE;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
return @elems;
|
||||
}
|
||||
|
||||
elsif ($name eq "and") {
|
||||
my $result = 1;
|
||||
foreach my $node ($condition->getChildNodes) {
|
||||
if ($node->nodeType == XML_ELEMENT_NODE) {
|
||||
$result &= evalCondition($storePaths, $node);
|
||||
}
|
||||
}
|
||||
return $result;
|
||||
|
||||
my %referencesCache;
|
||||
sub getReferences {
|
||||
my $path = shift;
|
||||
return $referencesCache{$path} if defined $referencesCache{$path};
|
||||
|
||||
my $references = `nix-store --query --references '$path'`;
|
||||
die "cannot query references" if $? != 0;
|
||||
$referencesCache{$path} = [split ' ', $references];
|
||||
|
||||
return $referencesCache{$path};
|
||||
}
|
||||
|
||||
elsif ($name eq "true") {
|
||||
return 1;
|
||||
|
||||
my %attrsCache;
|
||||
sub getAttr {
|
||||
my $path = shift;
|
||||
my $name = shift;
|
||||
my $key = "$path/$name";
|
||||
return $referencesCache{$key} if defined $referencesCache{$key};
|
||||
|
||||
my $value = `nix-store --query --binding '$name' '$path' 2> /dev/null`;
|
||||
$value = "" if $? != 0; # !!!
|
||||
chomp $value;
|
||||
$referencesCache{$key} = $value;
|
||||
|
||||
return $value;
|
||||
}
|
||||
|
||||
elsif ($name eq "false") {
|
||||
return 0;
|
||||
|
||||
sub evalCondition;
|
||||
|
||||
|
||||
sub traverse {
|
||||
my $done = shift;
|
||||
my $set = shift;
|
||||
my $path = shift;
|
||||
my $stopCondition = shift;
|
||||
|
||||
return if defined $done->{$path};
|
||||
$done->{$path} = 1;
|
||||
$set->{$path} = 1;
|
||||
|
||||
# print " in $path\n";
|
||||
|
||||
if (!evalCondition({$path => 1}, $stopCondition)) {
|
||||
# print " STOPPING in $path\n";
|
||||
return;
|
||||
}
|
||||
|
||||
# Get the requisites of the deriver.
|
||||
|
||||
foreach my $reference (@{getReferences $path}) {
|
||||
traverse($done, $set, $reference, $stopCondition);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
sub evalSet {
|
||||
my $inSet = shift;
|
||||
my $expr = shift;
|
||||
my $name = $expr->getName;
|
||||
|
||||
if ($name eq "traverse") {
|
||||
my $stopCondition = (getElemNodes $expr)[0];
|
||||
my $done = { };
|
||||
my $set = { };
|
||||
foreach my $path (keys %{$inSet}) {
|
||||
traverse($done, $set, $path, $stopCondition);
|
||||
}
|
||||
return $set;
|
||||
}
|
||||
|
||||
else {
|
||||
|
|
@ -68,16 +114,81 @@ sub evalCondition {
|
|||
}
|
||||
|
||||
|
||||
# Function for evaluating conditions.
|
||||
sub evalCondition {
|
||||
my $storePaths = shift;
|
||||
my $condition = shift;
|
||||
my $elemName = $condition->getName;
|
||||
|
||||
if ($elemName eq "containsSource") {
|
||||
my $hash = $condition->attributes->getNamedItem("hash")->getValue;
|
||||
foreach my $path (keys %{$storePathHashes{$hash}}) {
|
||||
return 1 if defined $storePaths->{$path};
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
elsif ($elemName eq "hasName") {
|
||||
my $nameRE = $condition->attributes->getNamedItem("name")->getValue;
|
||||
foreach my $path (keys %{$storePaths}) {
|
||||
return 1 if $path =~ /$nameRE/;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
elsif ($elemName eq "hasAttr") {
|
||||
my $name = $condition->attributes->getNamedItem("name")->getValue;
|
||||
my $valueRE = $condition->attributes->getNamedItem("value")->getValue;
|
||||
foreach my $path (keys %{$storePaths}) {
|
||||
if ($path =~ /\.drv$/) {
|
||||
my $value = getAttr($path, $name);
|
||||
# print " $path $name $value\n";
|
||||
return 1 if $value =~ /$valueRE/;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
elsif ($elemName eq "and") {
|
||||
my $result = 1;
|
||||
foreach my $node (getElemNodes $condition) {
|
||||
$result &= evalCondition($storePaths, $node);
|
||||
}
|
||||
return $result;
|
||||
}
|
||||
|
||||
elsif ($elemName eq "not") {
|
||||
return !evalCondition($storePaths, (getElemNodes $condition)[0]);
|
||||
}
|
||||
|
||||
elsif ($elemName eq "within") {
|
||||
my @elems = getElemNodes $condition;
|
||||
my $set = evalSet($storePaths, $elems[0]);
|
||||
return evalCondition($set, $elems[1]);
|
||||
}
|
||||
|
||||
elsif ($elemName eq "true") {
|
||||
return 1;
|
||||
}
|
||||
|
||||
elsif ($elemName eq "false") {
|
||||
return 0;
|
||||
}
|
||||
|
||||
else {
|
||||
die "unknown element `$elemName'";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
sub evalOr {
|
||||
my $storePaths = shift;
|
||||
my $nodes = shift;
|
||||
|
||||
my $result = 0;
|
||||
foreach my $node (@{$nodes}) {
|
||||
if ($node->nodeType == XML_ELEMENT_NODE) {
|
||||
$result |= evalCondition($storePaths, $node);
|
||||
}
|
||||
}
|
||||
|
||||
return $result;
|
||||
}
|
||||
|
|
@ -100,22 +211,22 @@ foreach my $userEnvElem (@userEnvElems) {
|
|||
|
||||
|
||||
# Get the requisites of the deriver.
|
||||
my $requisites = `nix-store --query --requisites --include-outputs '$deriver'`;
|
||||
die "cannot query requisites" if $? != 0;
|
||||
my @requisites = split ' ', $requisites;
|
||||
# my $requisites = `nix-store --query --requisites --include-outputs '$deriver'`;
|
||||
# die "cannot query requisites" if $? != 0;
|
||||
# my @requisites = split ' ', $requisites;
|
||||
|
||||
|
||||
# Get the hashes of the requisites.
|
||||
my $hashes = `nix-store --query --hash @requisites`;
|
||||
die "cannot query hashes" if $? != 0;
|
||||
my @hashes = split ' ', $hashes;
|
||||
for (my $i = 0; $i < scalar @requisites; $i++) {
|
||||
die unless $i < scalar @hashes;
|
||||
my $hash = $hashes[$i];
|
||||
$storePathHashes{$hash} = {} unless defined $storePathHashes{$hash};
|
||||
my $r = $storePathHashes{$hash}; # !!! fix
|
||||
$$r{$requisites[$i]} = 1;
|
||||
}
|
||||
# my $hashes = `nix-store --query --hash @requisites`;
|
||||
# die "cannot query hashes" if $? != 0;
|
||||
# my @hashes = split ' ', $hashes;
|
||||
# for (my $i = 0; $i < scalar @requisites; $i++) {
|
||||
# die unless $i < scalar @hashes;
|
||||
# my $hash = $hashes[$i];
|
||||
# $storePathHashes{$hash} = {} unless defined $storePathHashes{$hash};
|
||||
# my $r = $storePathHashes{$hash}; # !!! fix
|
||||
# $$r{$requisites[$i]} = 1;
|
||||
# }
|
||||
|
||||
|
||||
# Evaluate each blacklist item.
|
||||
|
|
@ -127,8 +238,8 @@ foreach my $userEnvElem (@userEnvElems) {
|
|||
die unless $condition;
|
||||
|
||||
# Evaluate the condition.
|
||||
my @foo = $condition->getChildNodes();
|
||||
if (evalOr(\@requisites, \@foo)) {
|
||||
my @elems = getElemNodes $condition;
|
||||
if (evalOr({$deriver => 1}, \@elems)) {
|
||||
# Oops, condition triggered.
|
||||
my $reason = ($item->getChildrenByTagName("reason"))[0]->getChildNodes->to_literal;
|
||||
$reason =~ s/\s+/ /g;
|
||||
|
|
|
|||
Loading…
Reference in a new issue