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SEC Consult SA-20241107-0 :: Multiple Vulnerabilities in HASOMED Elefant and Elefant Software Updater Unsafe eval() in TestRail CLI 4 vulnerabilities in ibmsecurity 32 vulnerabilities in IBM Security Verify Access xlibre Xnest security advisory & bugfix releases APPLE-SA-10-29-2024-1 Safari 18.1 SEC Consult SA-20241030-0 :: Query Filter Injection in Ping Identity PingIDM (formerly known as ForgeRock Identity Management) (CVE-2024-23600) SEC Consult SA-20241023-0 :: Authenticated Remote Code Execution in Multiple Xerox printers (CVE-2024-6333) APPLE-SA-10-28-2024-8 visionOS 2.1 APPLE-SA-10-28-2024-7 tvOS 18.1 APPLE-SA-10-28-2024-6 watchOS 11.1 APPLE-SA-10-28-2024-5 macOS Ventura 13.7.1 APPLE-SA-10-28-2024-4 macOS Sonoma 14.7.1 IT Security and Insecurity Portal www.waraxe.us Forum Index -> General discussion -> Cracking a zip file View previous topic :: View next topic Cracking a zip file Posted: Sun Jun 14, 2009 6:03 am Munchieman Beginner Joined: Jun 14, 2009 Posts: 2 Hello, I haven't seen much here about zip files, so I may be barking up the wrong tree. I am attempting to crack a zip file I created a long time ago. It is a zip file that is about 850K named temppix.zip. It contains 1 file called other pix. The file is encrypted too. I tried using the Passware software for a few days, but I'm past all of the normal short cuts, and using simple brute force. I don't ever remember using a password that is less that 10 characters, and I don't have the months it will take to brute force the file. After the various attacks, it comes up with some text that seems to include an MD5, but the online MD5 engines say that it isn't. Protection: Zip 2.0 - Extraction Password, Default encryption Complexity: Brute-force - Fast MD5: 079D883C35C1B556BEBA786C65CD177D Any suggestions on how I can open this file? Or, even get a list of the files that are within the otherpix.zip file? Thanks for the help! Munchieman Posted: Sun Jun 14, 2009 9:17 am waraxe Site admin Joined: May 11, 2004 Posts: 2407 Location: Estonia, Tartu Zip 2.0 encryption scheme is cryptographically weak and this is know allready long time, for example: http://archive.cert.uni-stuttgart.de/vuln-dev/2003/02/msg00019.html There are password crackers, which can decrypt ZIP archive contents within reasonable timeframe: http://www.elcomsoft.com/archpr.html Code: Advanced Archive Password Recovery recovers protection passwords or unlocks encrypted ZIP and RAR archives created with all versions of popular archivers. Recover passwords for plain and self-extracting archives created with PKZip and WinZip, RAR and WinRAR automatically or with your assistance. Guaranteed unlocking of archives created with WinZip 8.0 and earlier in under one hour is possible by exploiting an implementation flaw. Posted: Mon Jun 15, 2009 4:27 pm Munchieman Beginner Joined: Jun 14, 2009 Posts: 2 Hey Waraxe, Thanks for the reply. The weakness seems to be available when the file contains more than 3 to 5 files. I don't remember why, but I wanted to protect the file names, so I ziped the files into an encrypted archive that hides the filenames, and then zipped that archive into another encrypted archive. The software you suggested has been tried, and says that it can't do the guaranteed zip crack because of there only being 1 file in the archive. Any idea what kind of MD5 hash the Passware software showed? MD5: 079D883C35C1B556BEBA786C65CD177D Thanks again! 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