This one time, at band camp, Micha Lenk said: > Hello Stephen, > > clamscan fails to scan with a ZIP file created with a really old > PKZIP, which identifies itself as: > > PKZIP (R) FAST! Create/Update Utility Version 1.2 05-10-90 > Copr. 1989-1990 PKWARE Inc. All Rights Reserved. PKZIP/h for help > PKZIP Reg. U.S. Pat. and Tm. Off. > > The output of clamscan with a ZIP file generated by this PKZIP is: > > $ clamscan test.zip test.zip: Zip module failure 0, compressed: 376, > normal: 504, method: 6, ratio: 1 (max: 250) LibClamAV debug: Zip: > Incorrectly decompressed (0 != 504) > > It is no problem to unzip this file with the 'unzip' package, so this > should considered as a clamav bug or perhaps a zlib bug. > > I attached the failing zip file for reference...
This looks like a failure in zlib's inflate() routine. the miniunzip utility (in zlib-bin) also fails to unpack the zip file. Run under gdb, it becomes apparent that inflate is returning -3, which is apparently used to mean Z_DATA_ERROR. cc'ing the zlib maintainer on this. broonie, can you see what the problem is? -- ----------------------------------------------------------------- | ,''`. Stephen Gran | | : :' : [EMAIL PROTECTED] | | `. `' Debian user, admin, and developer | | `- http://www.debian.org | -----------------------------------------------------------------
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