CVE-2022-0405 (published 2022-04-03T19:15Z)

Improper Access Control in GitHub repository janeczku/calibre-web prior to 0.6.16.

Severity: MEDIUM
CVSS v2 base score: 4.0 (AV:N/AC:L/Au:S/C:P/I:N/A:N)
CVSS v3 base score: 4.3, MEDIUM (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)

Weakness information:
cwe_id: CWE-284
cwe_name: Improper Access Control
description: The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
extended_description: 
            Access control involves the use of several protection mechanisms such as:
            
               Authentication (proving the identity of an actor)
               Authorization (ensuring that a given actor can access a resource), and
               Accountability (tracking of activities that were performed)
            
            When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc.
            There are two distinct behaviors that can introduce access control weaknesses:
               
                  Specification: incorrect privileges, permissions, ownership, etc. are explicitly specified for either the user or the resource (for example, setting a password file to be world-writable, or giving administrator capabilities to a guest user). This action could be performed by the program or the administrator.
                  Enforcement: the mechanism contains errors that prevent it from properly enforcing the specified access control requirements (e.g., allowing the user to specify their own privileges, or allowing a syntactically-incorrect ACL to produce insecure settings). This problem occurs within the program itself, in that it does not actually enforce the intended security policy that the administrator specifies.
               
         
		 

Fix information:
repo_url: https://github.com/janeczku/calibre-web
commit_details: repo_url: https://github.com/janeczku/calibre-web
author: Ozzie Isaacs
author_date: 2022-01-22 18:23:08+01:00
msg: Kobo sync token is now also created if accessed from localhost(fixes #1990)
Create kobo sync token button is now "unclicked" after closing dialog
Additional localhost route is catched
If book format is deleted this also deletes the book synced to kobo status
repository: repo_url: https://github.com/janeczku/calibre-web
repo_name: janeczku/calibre-web
description: :books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
repo_language: Fluent
owner: janeczku
file_changes: filename: admin.py
change_type: ModificationType.MODIFY
diff: @@ -1426,14 +1426,14 @@ def _delete_user(content):
             for kobo_entry in kobo_entries:
                 ub.session.delete(kobo_entry)
             ub.session_commit()
-            log.info(u"User {} deleted".format(content.name))
-            return(_(u"User '%(nick)s' deleted", nick=content.name))
+            log.info("User {} deleted".format(content.name))
+            return(_("User '%(nick)s' deleted", nick=content.name))
         else:
-            log.warning(_(u"Can't delete Guest User"))
-            raise Exception(_(u"Can't delete Guest User"))
+            log.warning(_("Can't delete Guest User"))
+            raise Exception(_("Can't delete Guest User"))
     else:
-        log.warning(u"No admin user remaining, can't delete user")
-        raise Exception(_(u"No admin user remaining, can't delete user"))
+        log.warning("No admin user remaining, can't delete user")
+        raise Exception(_("No admin user remaining, can't delete user"))
 
 
 def _handle_edit_user(to_save, content, languages, translations, kobo_support):

programming_language: Python
filename: editbooks.py
change_type: ModificationType.MODIFY
diff: @@ -341,6 +341,7 @@ def delete_book_from_table(book_id, book_format, jsonResponse):
                 else:
                     calibre_db.session.query(db.Data).filter(db.Data.book == book.id).\
                         filter(db.Data.format == book_format).delete()
+                    kobo_sync_status.remove_synced_book(book.id, True)
                 calibre_db.session.commit()
             except Exception as ex:
                 log.debug_or_exception(ex)

programming_language: Python
filename: kobo_auth.py
change_type: ModificationType.MODIFY
diff: @@ -118,55 +118,49 @@ kobo_auth = Blueprint("kobo_auth", __name__, url_prefix="/kobo_auth")
 @kobo_auth.route("/generate_auth_token/<int:user_id>")
 @login_required
 def generate_auth_token(user_id):
+    warning = False
     host_list = request.host.rsplit(':')
     if len(host_list) == 1:
         host = ':'.join(host_list)
     else:
         host = ':'.join(host_list[0:-1])
-    if host.startswith('127.') or host.lower() == 'localhost' or host.startswith('[::ffff:7f'):
-        warning = _('PLease access calibre-web from non localhost to get valid api_endpoint for kobo device')
-        return render_title_template(
-            "generate_kobo_auth_url.html",
-            title=_(u"Kobo Setup"),
-            warning = warning
-        )
-    else:
-        # Invalidate any prevously generated Kobo Auth token for this user.
-        auth_token = ub.session.query(ub.RemoteAuthToken).filter(
-            ub.RemoteAuthToken.user_id == user_id
-        ).filter(ub.RemoteAuthToken.token_type==1).first()
-
-        if not auth_token:
-            auth_token = ub.RemoteAuthToken()
-            auth_token.user_id = user_id
-            auth_token.expiration = datetime.max
-            auth_token.auth_token = (hexlify(urandom(16))).decode("utf-8")
-            auth_token.token_type = 1
-
-            ub.session.add(auth_token)
-            ub.session_commit()
-
-        books = calibre_db.session.query(db.Books).join(db.Data).all()
-
-        for book in books:
-            formats = [data.format for data in book.data]
-            if not 'KEPUB' in formats and config.config_kepubifypath and 'EPUB' in formats:
-                helper.convert_book_format(book.id, config.config_calibre_dir, 'EPUB', 'KEPUB', current_user.name)
-
-        return render_title_template(
-            "generate_kobo_auth_url.html",
-            title=_(u"Kobo Setup"),
-            kobo_auth_url=url_for(
-                "kobo.TopLevelEndpoint", auth_token=auth_token.auth_token, _external=True
-            ),
-            warning = False
-        )
+    if host.startswith('127.') or host.lower() == 'localhost' or host.startswith('[::ffff:7f') or host == "[::1]":
+        warning = _('Please access Calibre-Web from non localhost to get valid api_endpoint for kobo device')
+
+    # Generate auth token if none is existing for this user
+    auth_token = ub.session.query(ub.RemoteAuthToken).filter(
+        ub.RemoteAuthToken.user_id == user_id
+    ).filter(ub.RemoteAuthToken.token_type==1).first()
+
+    if not auth_token:
+        auth_token = ub.RemoteAuthToken()
+        auth_token.user_id = user_id
+        auth_token.expiration = datetime.max
+        auth_token.auth_token = (hexlify(urandom(16))).decode("utf-8")
+        auth_token.token_type = 1
+
+        ub.session.add(auth_token)
+        ub.session_commit()
+
+    books = calibre_db.session.query(db.Books).join(db.Data).all()
+
+    for book in books:
+        formats = [data.format for data in book.data]
+        if not 'KEPUB' in formats and config.config_kepubifypath and 'EPUB' in formats:
+            helper.convert_book_format(book.id, config.config_calibre_dir, 'EPUB', 'KEPUB', current_user.name)
+
+    return render_title_template(
+        "generate_kobo_auth_url.html",
+        title=_(u"Kobo Setup"),
+        auth_token=auth_token.auth_token,
+        warning = warning
+    )
 
 
 @kobo_auth.route("/deleteauthtoken/<int:user_id>", methods=["POST"])
 @login_required
 def delete_auth_token(user_id):
-    # Invalidate any prevously generated Kobo Auth token for this user.
+    # Invalidate any previously generated Kobo Auth token for this user
     ub.session.query(ub.RemoteAuthToken).filter(ub.RemoteAuthToken.user_id == user_id)\
         .filter(ub.RemoteAuthToken.token_type==1).delete()
 

programming_language: Python
filename: main.js
change_type: ModificationType.MODIFY
diff: @@ -535,6 +535,7 @@ $(function() {
 
     $("#modal_kobo_token")
         .on("show.bs.modal", function(e) {
+            $(e.relatedTarget).one('focus', function(e){$(this).blur();});
             var $modalBody = $(this).find(".modal-body");
 
             // Prevent static assets from loading multiple times

programming_language: JavaScript
filename: generate_kobo_auth_url.html
change_type: ModificationType.MODIFY
diff: @@ -1,12 +1,15 @@
 {% extends "fragment.html" %}
 {% block body %}
 <div class="well">
-  <p>
-    {{_('Open the .kobo/Kobo eReader.conf file in a text editor and add (or edit):')}}</a>
+<p>
+  {% if not warning %}
+      {{_('Open the .kobo/Kobo eReader.conf file in a text editor and add (or edit):')}}
+    </p><p>
+      api_endpoint={{url_for("kobo.TopLevelEndpoint", auth_token=auth_token, _external=True)}}
+  {% else %}
+      {{warning}}
+    </p><p>{{_('Kobo Token:')}} {{ auth_token }}
+  {% endif %}
   </p>
-  <p>
-    {% if not warning %}api_endpoint={{kobo_auth_url}}{% else %}{{warning}}{% endif %}</a>
-  </p>
-  <p>
 </div>
 {% endblock %}

programming_language: HTML