Hello, I didn't had time to investigate too much since is weekend and family
will be really unhappy:))Since the whole investigation was made on the phone i
will be brief.--leave-temps doesn't provide any clue but debug clarifies the
problem.Unfortunately we face a bug(i will also look tomorrow for what is
reported already).Simple put when special characters are set the name of the
file(including file extension) is truncated.With special caracter:LibClamAV
debug: Checking realpath of just.rarLibClamAV debug: in cli_magic_scandesc
(reclevel: 0/16)LibClamAV debug: Recognized RAR fileLibClamAV debug:
cache_check: 2c04496b1308e6349e3726f91e156235 is negativeLibClamAV debug: in
scanrar()unrar_open: Comments are not present in this archive.unrar_open:
Volume attribute (archive volume): nounrar_open: Archive comment
present: nounrar_open: Archive lock attribute:
nounrar_open: Solid attribute (solid archive):
nounrar_open: New volume naming scheme ('volname.partN.rar'): yesunrar_open:
Authenticity information present (obsolete): nounrar_open: Recovery record
present: nounrar_open: Block headers are encrypted:
nounrar_open: First volume (set only by RAR 3.0 and later):
nounrar_open: Opened archive:
/home/iulian/viruses/1/just.rarunrar_peek_file_header: Name:
CONSILIERE PLATunrar_peek_file_header: Directory?:
0unrar_peek_file_header: Target Dir: 0unrar_peek_file_header: RAR
Version: 50unrar_peek_file_header: Packed Size: 5unrar_peek_file_header:
Unpacked Size: 5LibClamAV debug: RAR: CONSILIERE PLAT, crc32: 0x3bb935c6,
encrypted: 0, compressed: 5, normal: 5, method: 48, ratio: 1LibClamAV debug:
CDBNAME:CL_TYPE_RAR:5:CONSILIERE PLAT:5:5:0:1:1001993670:(nil)LibClamAV debug:
RAR: Extracting file: CONSILIERE PLAT to
/tmp/just.rar.01e96/clamav-2b546d5049d12d4cfcee3cd6e993f061.tmpunrar_extract_file:
Extracted file to:
/tmp/just.rar.01e96/clamav-2b546d5049d12d4cfcee3cd6e993f061.tmpLibClamAV debug:
RAR: Extraction complete. Scanning now...LibClamAV debug: in
cli_magic_scandesc (reclevel: 1/16)LibClamAV debug: Small data (5
bytes)LibClamAV debug: cli_magic_scandesc: returning 0 at line 4057 (no post,
no cache)unrar_retcode: No more files in archive.LibClamAV debug: RAR: No more
files in archive.LibClamAV debug: RAR: Exit code: 0LibClamAV debug: hashtab:
Freeing hashset, elements: 0, capacity: 0LibClamAV debug: cli_magic_scandesc:
returning 0 at line 3202LibClamAV debug: cache_add:
2c04496b1308e6349e3726f91e156235 (level 0)/home/iulian/viruses/1/just.rar:
OKLibClamAV debug: Cleaning up phishcheckLibClamAV debug: Freeing phishcheck
structLibClamAV debug: Phishcheck cleaned upWithout special
characters:LibClamAV debug: Checking realpath of anothertest.rarLibClamAV
debug: in cli_magic_scandesc (reclevel: 0/16)LibClamAV debug: Recognized RAR
fileLibClamAV debug: cache_check: bbe25db3191912601ee2b12860c99627 is
negativeLibClamAV debug: in scanrar()unrar_open: Comments are not present in
this archive.unrar_open: Volume attribute (archive volume):
nounrar_open: Archive comment present: nounrar_open:
Archive lock attribute: nounrar_open: Solid attribute
(solid archive): nounrar_open: New volume naming scheme
('volname.partN.rar'): yesunrar_open: Authenticity information present
(obsolete): nounrar_open: Recovery record present:
nounrar_open: Block headers are encrypted: nounrar_open:
First volume (set only by RAR 3.0 and later): nounrar_open: Opened archive:
/home/iulian/viruses/1/anothertest.rarunrar_peek_file_header: Name:
CONSILIERE PLATA_Pdf.exeunrar_peek_file_header: Directory?:
0unrar_peek_file_header: Target Dir: 0unrar_peek_file_header: RAR
Version: 50unrar_peek_file_header: Packed Size: 5unrar_peek_file_header:
Unpacked Size: 5LibClamAV debug: RAR: CONSILIERE PLATA_Pdf.exe, crc32:
0x3bb935c6, encrypted: 0, compressed: 5, normal: 5, method: 48, ratio:
1LibClamAV debug: CDBNAME:CL_TYPE_RAR:5:CONSILIERE
PLATA_Pdf.exe:5:5:0:1:1001993670:(nil)LibClamAV debug: FP SIGNATURE:
bbe25db3191912601ee2b12860c99627:95:Archived_EXE.UNOFFICIAL/home/iulian/viruses/1/anothertest.rar:
Archived_EXE.UNOFFICIAL FOUNDLibClamAV debug: RAR: Exit code: 1LibClamAV
debug: cli_magic_scandesc: returning 1 at line 3202LibClamAV debug: Cleaning
up phishcheckLibClamAV debug: Freeing phishcheck structLibClamAV debug:
Phishcheck cleaned upBest regads,IulianSent from my Samsung Galaxy smartphone.
-------- Original message --------From: "G.W. Haywood via clamav-users"
<[email protected]> Date: 10/4/20 12:27 (GMT+02:00) To: iulian
stan via clamav-users <[email protected]> Cc: "G.W. Haywood"
<[email protected]> Subject: Re: [clamav-users] possible rar issues
when files have special
characters Hi there,On Sun, 4 Oct 2020, iulian stan via clamav-users wrote:>
I know that relying on the file extension is not perfect but i will> say it is
covering most of the threats.Understood, a pragmatic approach.> Anyhow my
raised question was about: Why .exe is not detected when> the file inside
archive has a special character? This problem is> manifesting only with RAR.
For files which don't have special> character RAR is behaving as expected.Good
question. Perhaps if you use the --leave-temps option andinspect the temporary
files left after scanning it might shed somelight on the issue. Have you
checked the ClamAV Bugzilla issues tosee if there's anything similar
mentioned?Does the same thing also happen if you use clamdscan instead?Can you
simply block all .rar files? I do that for mail, but I don'tgenerally scan
filesystems at all.--
73,Ged._______________________________________________clamav-users mailing
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