From 0d7a4fbf959a1c522350786e83df580476bf5642 Mon Sep 17 00:00:00 2001 From: "mkanat%kerio.com" <> Date: Fri, 8 Jul 2005 12:29:14 +0000 Subject: Bug 293159: [SECURITY] Anyone can change flags and access bug summaries due to a bad check in Flag::validate() and Flag::modify() Patch By Frederic Buclin r=myk, a=justdave --- Bugzilla/Flag.pm | 124 ++++++++++++++++-------- Bugzilla/FlagType.pm | 48 +++++++-- attachment.cgi | 9 +- process_bug.cgi | 11 +-- template/en/default/global/code-error.html.tmpl | 27 ++++++ 5 files changed, 159 insertions(+), 60 deletions(-) diff --git a/Bugzilla/Flag.pm b/Bugzilla/Flag.pm index f19369c24..b0a0586c2 100644 --- a/Bugzilla/Flag.pm +++ b/Bugzilla/Flag.pm @@ -235,17 +235,47 @@ Validates fields containing flag modifications. =cut sub validate { + my ($cgi, $bug_id, $attach_id) = @_; + my $user = Bugzilla->user; - my ($cgi, $bug_id) = @_; - + my $dbh = Bugzilla->dbh; + # Get a list of flags to validate. Uses the "map" function # to extract flag IDs from form field names by matching fields # whose name looks like "flag-nnn", where "nnn" is the ID, # and returning just the ID portion of matching field names. my @ids = map(/^flag-(\d+)$/ ? $1 : (), $cgi->param()); - - foreach my $id (@ids) - { + + return unless scalar(@ids); + + # No flag reference should exist when changing several bugs at once. + ThrowCodeError("flags_not_available", { type => 'b' }) unless $bug_id; + + # No reference to existing flags should exist when creating a new + # attachment. + if ($attach_id && ($attach_id < 0)) { + ThrowCodeError("flags_not_available", { type => 'a' }); + } + + # Make sure all flags belong to the bug/attachment they pretend to be. + my $field = ($attach_id) ? "attach_id" : "bug_id"; + my $field_id = $attach_id || $bug_id; + my $not = ($attach_id) ? "" : "NOT"; + + my $invalid_data = + $dbh->selectrow_array("SELECT 1 FROM flags + WHERE id IN (" . join(',', @ids) . ") + AND ($field != ? OR attach_id IS $not NULL) " . + $dbh->sql_limit(1), + undef, $field_id); + + if ($invalid_data) { + ThrowCodeError("invalid_flag_association", + { bug_id => $bug_id, + attach_id => $attach_id }); + } + + foreach my $id (@ids) { my $status = $cgi->param("flag-$id"); # Make sure the flag exists. @@ -269,48 +299,60 @@ sub validate { ThrowCodeError("flag_status_invalid", { id => $id, status => $status }); } - + + # Make sure the user didn't specify a requestee unless the flag + # is specifically requestable. If the requestee was set before + # the flag became specifically unrequestable, leave it as is. + my $old_requestee = + $flag->{'requestee'} ? $flag->{'requestee'}->login : ''; + my $new_requestee = trim($cgi->param("requestee-$id") || ''); + + if ($status eq '?' + && !$flag->{type}->{is_requesteeble} + && $new_requestee + && ($new_requestee ne $old_requestee)) + { + ThrowCodeError("flag_requestee_disabled", + { name => $flag->{type}->{name} }); + } + # Make sure the requestee is authorized to access the bug. # (and attachment, if this installation is using the "insider group" # feature and the attachment is marked private). if ($status eq '?' && $flag->{type}->{is_requesteeble} - && trim($cgi->param("requestee-$id"))) + && $new_requestee + && ($old_requestee ne $new_requestee)) { - my $requestee_email = trim($cgi->param("requestee-$id")); - my $old_requestee = - $flag->{'requestee'} ? $flag->{'requestee'}->login : ''; - - if ($old_requestee ne $requestee_email) { - # We know the requestee exists because we ran - # Bugzilla::User::match_field before getting here. - my $requestee = Bugzilla::User->new_from_login($requestee_email); - - # Throw an error if the user can't see the bug. - if (!$requestee->can_see_bug($bug_id)) - { - ThrowUserError("flag_requestee_unauthorized", - { flag_type => $flag->{'type'}, - requestee => $requestee, - bug_id => $bug_id, - attach_id => - $flag->{target}->{attachment}->{id} }); - } - - # Throw an error if the target is a private attachment and - # the requestee isn't in the group of insiders who can see it. - if ($flag->{target}->{attachment}->{exists} - && $cgi->param('isprivate') - && Param("insidergroup") - && !$requestee->in_group(Param("insidergroup"))) - { - ThrowUserError("flag_requestee_unauthorized_attachment", - { flag_type => $flag->{'type'}, - requestee => $requestee, - bug_id => $bug_id, - attach_id => - $flag->{target}->{attachment}->{id} }); - } + # We know the requestee exists because we ran + # Bugzilla::User::match_field before getting here. + my $requestee = Bugzilla::User->new_from_login($new_requestee); + + # Throw an error if the user can't see the bug. + # Note that if permissions on this bug are changed, + # can_see_bug() will refer to old settings. + if (!$requestee->can_see_bug($bug_id)) { + ThrowUserError("flag_requestee_unauthorized", + { flag_type => $flag->{'type'}, + requestee => $requestee, + bug_id => $bug_id, + attach_id => + $flag->{target}->{attachment}->{id} }); + } + + # Throw an error if the target is a private attachment and + # the requestee isn't in the group of insiders who can see it. + if ($flag->{target}->{attachment}->{exists} + && $cgi->param('isprivate') + && Param("insidergroup") + && !$requestee->in_group(Param("insidergroup"))) + { + ThrowUserError("flag_requestee_unauthorized_attachment", + { flag_type => $flag->{'type'}, + requestee => $requestee, + bug_id => $bug_id, + attach_id => + $flag->{target}->{attachment}->{id} }); } } diff --git a/Bugzilla/FlagType.pm b/Bugzilla/FlagType.pm index ceeb9a38a..97c6f2c0e 100644 --- a/Bugzilla/FlagType.pm +++ b/Bugzilla/FlagType.pm @@ -325,13 +325,32 @@ and returning just the ID portion of matching field names. =cut sub validate { - my $user = Bugzilla->user; my ($cgi, $bug_id, $attach_id) = @_; - + + my $user = Bugzilla->user; + my $dbh = Bugzilla->dbh; + my @ids = map(/^flag_type-(\d+)$/ ? $1 : (), $cgi->param()); - foreach my $id (@ids) - { + return unless scalar(@ids); + + # No flag reference should exist when changing several bugs at once. + ThrowCodeError("flags_not_available", { type => 'b' }) unless $bug_id; + + # We don't check that these flag types are valid for + # this bug/attachment. This check will be done later when + # processing new flags, see Flag::FormToNewFlags(). + + # All flag types have to be active + my $inactive_flagtypes = + $dbh->selectrow_array("SELECT 1 FROM flagtypes + WHERE id IN (" . join(',', @ids) . ") + AND is_active = 0 " . + $dbh->sql_limit(1)); + + ThrowCodeError("flag_type_inactive") if $inactive_flagtypes; + + foreach my $id (@ids) { my $status = $cgi->param("flag_type-$id"); # Don't bother validating types the user didn't touch. @@ -353,22 +372,31 @@ sub validate { { id => $id , status => $status }); } + # Make sure the user didn't specify a requestee unless the flag + # is specifically requestable. + my $new_requestee = trim($cgi->param("requestee_type-$id") || ''); + + if ($status eq '?' + && !$flag_type->{is_requesteeble} + && $new_requestee) + { + ThrowCodeError("flag_requestee_disabled", + { name => $flag_type->{name} }); + } + # Make sure the requestee is authorized to access the bug # (and attachment, if this installation is using the "insider group" # feature and the attachment is marked private). if ($status eq '?' && $flag_type->{is_requesteeble} - && trim($cgi->param("requestee_type-$id"))) + && $new_requestee) { - my $requestee_email = trim($cgi->param("requestee_type-$id")); - # We know the requestee exists because we ran # Bugzilla::User::match_field before getting here. - my $requestee = Bugzilla::User->new_from_login($requestee_email); + my $requestee = Bugzilla::User->new_from_login($new_requestee); # Throw an error if the user can't see the bug. - if (!$requestee->can_see_bug($bug_id)) - { + if (!$requestee->can_see_bug($bug_id)) { ThrowUserError("flag_requestee_unauthorized", { flag_type => $flag_type, requestee => $requestee, diff --git a/attachment.cgi b/attachment.cgi index 0c010a061..e4cbe8eed 100755 --- a/attachment.cgi +++ b/attachment.cgi @@ -913,8 +913,11 @@ sub insert $vars->{'message'} = 'user_match_multiple'; } - Bugzilla::Flag::validate($cgi, $bugid); - Bugzilla::FlagType::validate($cgi, $bugid, $cgi->param('id')); + # Flag::validate() should not detect any reference to existing + # flags when creating a new attachment. Setting the third param + # to -1 will force this function to check this point. + Bugzilla::Flag::validate($cgi, $bugid, -1); + Bugzilla::FlagType::validate($cgi, $bugid); # Escape characters in strings that will be used in SQL statements. my $sql_filename = SqlQuote($filename); @@ -1148,7 +1151,7 @@ sub update Bugzilla::User::match_field($cgi, { '^requestee(_type)?-(\d+)$' => { 'type' => 'single' } }); - Bugzilla::Flag::validate($cgi, $bugid); + Bugzilla::Flag::validate($cgi, $bugid, $attach_id); Bugzilla::FlagType::validate($cgi, $bugid, $attach_id); # Lock database tables in preparation for updating the attachment. diff --git a/process_bug.cgi b/process_bug.cgi index 1fa8400e9..4b6410b2c 100755 --- a/process_bug.cgi +++ b/process_bug.cgi @@ -165,12 +165,11 @@ foreach my $field ("dependson", "blocked") { 'assigned_to' => { 'type' => 'single' }, '^requestee(_type)?-(\d+)$' => { 'type' => 'single' }, }); -# Validate flags, but only if the user is changing a single bug, -# since the multi-change form doesn't include flag changes. -if (defined $cgi->param('id')) { - Bugzilla::Flag::validate($cgi, $cgi->param('id')); - Bugzilla::FlagType::validate($cgi, $cgi->param('id')); -} + +# Validate flags in all cases. validate() should not detect any +# reference to flags if $cgi->param('id') is undefined. +Bugzilla::Flag::validate($cgi, $cgi->param('id')); +Bugzilla::FlagType::validate($cgi, $cgi->param('id')); ###################################################################### # End Data/Security Validation diff --git a/template/en/default/global/code-error.html.tmpl b/template/en/default/global/code-error.html.tmpl index fd3f8fb20..36a752949 100644 --- a/template/en/default/global/code-error.html.tmpl +++ b/template/en/default/global/code-error.html.tmpl @@ -135,6 +135,15 @@ [% title = "Invalid Dimensions" %] The width or height specified is not a positive integer. + [% ELSIF error == "invalid_flag_association" %] + [% title = "Invalid Flag Association" %] + Some flags do not belong to + [% IF attach_id %] + attachment [% attach_id FILTER html %]. + [% ELSE %] + [%+ terms.bug %] [%+ bug_id FILTER html %]. + [% END %] + [% ELSIF error == "invalid_isactive_flag" %] [% title = "Invalid isactive flag" %] The active flag was improperly set. There may be @@ -153,6 +162,20 @@ [% ELSIF error == "flag_nonexistent" %] There is no flag with ID #[% id FILTER html %]. + + [% ELSIF error == "flags_not_available" %] + [% title = "Flag Editing not Allowed" %] + [% IF type == "b" %] + Flags cannot be set or changed when + changing several [% terms.bugs %] at once. + [% ELSE %] + References to existing flags when creating + a new attachment are invalid. + [% END %] + + [% ELSIF error == "flag_requestee_disabled" %] + [% title = "Flag not Specifically Requestable" %] + The flag [% name FILTER html %] is not specifically requestable. [% ELSIF error == "flag_status_invalid" %] The flag status [% status FILTER html %] @@ -172,6 +195,10 @@ The flag type ID [% id FILTER html %] is not a positive integer. + [% ELSIF error == "flag_type_inactive" %] + [% title = "Inactive Flag Types" %] + Some flag types are inactive and cannot be used to create new flags. + [% ELSIF error == "flag_type_nonexistent" %] There is no flag type with the ID [% id FILTER html %]. -- cgit v1.2.3-24-g4f1b