Core Security - Corelabs Advisory http://corelabs.coresecurity.com/ Artweaver Buffer Overflow Vulnerability 1. *Advisory Information* Title: Artweaver Buffer Overflow Vulnerability Advisory ID: CORE-2013-0701 Advisory URL: http://www.coresecurity.com/advisories/artweaver-buffer-overflow-vulnerability Date published: 2013-07-22 Date of last update: 2013-07-22 Vendors contacted: Artweaver Release mode: Coordinated release 2. *Vulnerability Information* Class: Buffer overflow [CWE-119] Impact: Code execution Remotely Exploitable: Yes Locally Exploitable: No CVE Name: CVE-2013-2576 3. *Vulnerability Description* Artweaver [1], [2] is prone to a security vulnerability when processing AWD files. This vulnerability could be exploited by a remote attacker to execute arbitrary code on the target machine by enticing Artweaver users to open a specially crafted file. 4. *Vulnerable Packages* . Artweaver v3.1.5. . Older versions are probably affected too, but they were not checked. 5. *Non-Vulnerable Packages* . Artweaver v3.1.6. . Artweaver v4.0. 6. *Vendor Information, Solutions and Workarounds* Vendor notifies that Artweaver v3.1.6 and v4.0 are available and fix the reported vulnerability. Vendor encourages all Artweaver users to update to the latest version: 1. http://www.artweaver.de/en/help/68 2. Artweaver Plus - http://www.artweaver.de/en/help/80 3. Artweaver Free - http://www.artweaver.de/en/help/81 7. *Credits* This vulnerability was discovered and researched by Daniel Kazimirow from Core Exploit Writers Team. The publication of this advisory was coordinated by Fernando Miranda from Core Advisories Team. 8. *Technical Description / Proof of Concept Code* Below is shown the result of opening the maliciously crafted file 'CORE-2013-0701-artweaver-poc-28ab190b137f3.AWD'[3], which means the normal execution flow can be altered in order to execute arbitrary code. /----- 004F3265 8B45 FC MOV EAX,DWORD PTR SS:[EBP-4] 004F3268 8B40 28 MOV EAX,DWORD PTR DS:[EAX+28] 004F326B 8B10 MOV EDX,DWORD PTR DS:[EAX] 004F326D FF12 CALL DWORD PTR DS:[EDX] ; <--- crash DS:[45454545]=??? EAX 030F9C48 ASCII "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE ECX 019983F0 EDX 45454545 EBX 019983F0 ESP 0012FB7C EBP 0012FB90 ESI 00000000 EDI 00000013 EIP 004F326D Artweave.004F326D C 0 ES 0023 32bit 0(FFFFFFFF) P 1 CS 001B 32bit 0(FFFFFFFF) A 0 SS 0023 32bit 0(FFFFFFFF) Z 0 DS 0023 32bit 0(FFFFFFFF) S 0 FS 003B 32bit 7FFDF000(FFF) T 0 GS 0000 NULL D 0 O 0 LastErr ERROR_SUCCESS (00000000) EFL 00010206 (NO,NB,NE,A,NS,PE,GE,G) ST0 empty -??? FFFF 00005FEE 0F0566FB ST1 empty -??? FFFF 00000000 0F05070D ST2 empty -??? FFFF 00000000 00060010 ST3 empty -??? FFFF 00000000 002C006F ST4 empty -NAN FFFF 8F669BF5 EFE5EDFD ST5 empty 6.0925232094539560960e+16 ST6 empty -7.8331661972355807100e+18 ST7 empty 5.8691123250627328000e+16 3 2 1 0 E S P U O Z D I FST 0020 Cond 0 0 0 0 Err 0 0 1 0 0 0 0 0 (GT) FCW 1372 Prec NEAR,64 Mask 1 1 0 0 1 0 -----/ 9. *Report Timeline* . 2013-07-04: Core Security Technologies notifies the Artweaver team of the vulnerability. . 2013-07-05: Vendor asks for a report with technical information. . 2013-07-05: Technical details sent to Artweaver team. Core notifies that the publication date is scheduled for the end of July. . 2013-07-06: Vendor reproduces the buffer overrun and notifies that they are looking for the cause of the problem. . 2013-07-10: Vendor notifies that this vulnerability will be fixed with the next Artweaver update v3.1.6, scheduled for July 20th. . 2013-07-10: Core re-schedules the advisory publication for Monday 22nd. . 2013-07-20: Vendor notifies patched versions were released and aditional information for Artweaver users. [Sec. 6] . 2013-07-22: Advisory CORE-2013-0701 released. 10. *References* [1] http://www.artweaver.de. [2] http://www.b-e-soft.com/products#artweaver. [3] http://www.coresecurity.com/system/files/attachments/2013/07/CORE-2013-0701-artweaver-poc-28ab190b137f3.zip 11. *About CoreLabs* CoreLabs, the research center of Core Security Technologies, is charged with anticipating the future needs and requirements for information security technologies. We conduct our research in several important areas of computer security including system vulnerabilities, cyber attack planning and simulation, source code auditing, and cryptography. Our results include problem formalization, identification of vulnerabilities, novel solutions and prototypes for new technologies. CoreLabs regularly publishes security advisories, technical papers, project information and shared software tools for public use at: http://corelabs.coresecurity.com. 12. *About Core Security Technologies* Core Security Technologies enables organizations to get ahead of threats with security test and measurement solutions that continuously identify and demonstrate real-world exposures to their most critical assets. Our customers can gain real visibility into their security standing, real validation of their security controls, and real metrics to more effectively secure their organizations. Core Security's software solutions build on over a decade of trusted research and leading-edge threat expertise from the company's Security Consulting Services, CoreLabs and Engineering groups. Core Security Technologies can be reached at +1 (617) 399-6980 or on the Web at: http://www.coresecurity.com. 13. *Disclaimer* The contents of this advisory are copyright (c) 2013 Core Security Technologies and (c) 2013 CoreLabs, and are licensed under a Creative Commons Attribution Non-Commercial Share-Alike 3.0 (United States) License: http://creativecommons.org/licenses/by-nc-sa/3.0/us/ 14. *PGP/GPG Keys* This advisory has been signed with the GPG key of Core Security Technologies advisories team, which is available for download at http://www.coresecurity.com/files/attachments/core_security_advisories.asc.