[Clamav-devel] Building ClamAV 0.99 with PCRE support

Mark Allan markjallan at gmail.com
Wed Dec 9 06:19:12 EST 2015


Hi Kevin,

Yes, that's fixed it. Thanks so much.

I still can't fathom why it would work differently on different versions of OS X, but it looks like you've solved the problem I'm seeing for now.

Thanks again
Mark

> On 8 Dec 2015, at 8:21 pm, Kevin Lin <klin at sourcefire.com> wrote:
> 
> Can I ask you to try this patch and tell me if it fixes the issue? If the
> issue persists, please submit the debug log. Thanks.
> 
> -Kevin
> 
> On Tue, Dec 8, 2015 at 2:00 PM, Mark Allan <markjallan at gmail.com> wrote:
> 
>> Hi Kevin,
>> 
>> Thanks.
>> 
>> Yes, the configure options are definitely the same. In fact PCRE isn't
>> installed on OS X by default, so I'm compiling it as well and copying all
>> the binaries & libraries etc over to the destination machines at the same
>> time as copying the ClamAV binaries.
>> 
>> Mark
>> 
>>> On 8 Dec 2015, at 6:36 pm, Kevin Lin <klin at sourcefire.com> wrote:
>>> 
>>> It appears that the PCRE library is correctly linking in and ClamAV is
>>> making calls to it. The error message:
>>> 
>>> LibClamAV Error: cli_pcre_parse: PCRE compilation failed at offset 0:
>>> unknown option bit(s) set
>>> 
>>> results directly from a failed compilation of PCRE regex which in this
>> case
>>> is due to an unknown option bit being set.
>>> 
>>> Looking into it, the options that can be passed to pcre_compile are
>> fairly
>>> common ones; the only real exception is PCRE_NEVER_UTF which was added in
>>> 8.33. It's possible that the flag existed on the source machine but not
>> the
>>> destination.Are the PCRE configure options consistent across the source
>> and
>>> all the destination machines?
>>> 
>>> -Kevin
>>> 
>>> 
>>> 
>>> On Tue, Dec 8, 2015 at 12:15 PM, Mark Allan <markjallan at gmail.com>
>> wrote:
>>> 
>>>> Hi all,
>>>> 
>>>> Are there any recommendations for compilation options on/with pcre?
>>>> 
>>>> I've tried several things but can't seem to get the build to work on
>>>> anything other than OS X 10.11.  I never have a problem moving my ClamAV
>>>> builds between machines, but something's going wrong with PCRE support -
>>>> even when I build PCRE on the destination machine, I always end up with
>> the
>>>> following error from clamscan:
>>>> 
>>>> LibClamAV Error: cli_pcre_parse: PCRE compilation failed at offset 0:
>>>> unknown option bit(s) set
>>>> LibClamAV Error: cli_pcre_build: failed to build pcre regex
>>>> ERROR: Database initialization error: Malformed database
>>>> 
>>>> 
>>>> Here's a section of the output with --debug on:
>>>> 
>>>> LibClamAV debug: Ignoring signature Email.Trojan-417
>>>> LibClamAV debug: main.ndb loaded
>>>> LibClamAV debug: main.zmd loaded
>>>> LibClamAV debug: main.fp loaded
>>>> LibClamAV debug: in cli_tgzload_cleanup()
>>>> LibClamAV debug: /usr/local/share/clamav/main.cvd loaded
>>>> LibClamAV debug: Using filter for trie 0
>>>> LibClamAV Error: cli_pcre_parse: PCRE compilation failed at offset 0:
>>>> unknown option bit(s) set
>>>> LibClamAV Error: cli_pcre_build: failed to build pcre regex
>>>> ERROR: Database initialization error: Malformed database
>>>> LibClamAV debug: Cleaning up phishcheck
>>>> LibClamAV debug: Freeing phishcheck struct
>>>> LibClamAV debug: Phishcheck cleaned up
>>>> 
>>>> These are the options I'm passing to pcre's configure phase:
>>>> ./configure --prefix=/usr/local --enable-newline-is-any --enable-utf
>>>> --enable-unicode-properties --enable-rebuild-chartables --enable-pcre16
>>>> --enable-pcre32 --enable-jit
>>>> 
>>>> This is what I'm passing to ClamAV's configure phase:
>>>> ./configure --disable-dependency-tracking  --enable-llvm=no
>>>> --enable-clamdtop --with-user=_clamav --with-group=_clamav
>>>> --enable-all-jit-targets --with-pcre=/usr/local --prefix=/usr/local
>>>> 
>>>> I get the same results regardless of what options I pass to PCRE's
>>>> configure script. I've also tried pcre-8.37 and pcre-8.38.
>>>> 
>>>> Can anyone suggest anything?
>>>> 
>>>> Many thanks
>>>> Mark
>>>> 
>>>>> On 20 Nov 2015, at 6:01 pm, Mickey Sola <msola at sourcefire.com> wrote:
>>>>> 
>>>>> Hi Mark,
>>>>> 
>>>>> Unfortunately, as of right now the only way to get pcre 8.38 is via
>> their
>>>>> rc1 candidate (check the pcre-dev mailing list for a tarball).
>>>>> 
>>>>> In practice, the pcre exploit ClamAV warns about (
>>>>> http://www.securitytracker.com/id/1032453) relies upon an explicitly
>>>>> malicious regex, so you don't have to worry too much unless you're
>> using
>>>>> untrusted sigs. Everything should still compile and run just fine, even
>>>>> with 8.37.
>>>>> 
>>>>> - Mickey
>>>>> 
>>>>> On Fri, Nov 20, 2015 at 8:08 AM, Mark Allan <markjallan at gmail.com>
>>>> wrote:
>>>>> 
>>>>>> Hi all,
>>>>>> 
>>>>>> I saw the blog post about v0.99 rc 2 and have downloaded it for
>> testing.
>>>>>> 
>>>>>> It looks like bug 11411 [
>>>>>> https://bugzilla.clamav.net/show_bug.cgi?id=11411 ] is still open,
>> so I
>>>>>> decided to download and build PCRE as well.
>>>>>> 
>>>>>> I initially tried the PCRE2 branch but it wasn't recognised by
>> ClamAV's
>>>>>> configure script, so I went with the most up-to-date version of PCRE
>>>> (which
>>>>>> is currently 8.37) but now configure outputs the following:
>>>>>> 
>>>>>> configure: WARNING: The installed pcre version may contain a security
>>>> bug.
>>>>>> Please upgrade to 8.38 or later: http://www.pcre.org
>>>>>> 
>>>>>> There is no 8.38 that I can see:
>>>>>>      https://sourceforge.net/projects/pcre/files/pcre/
>>>>>> 
>>>>>> Are you just assuming that 8.38 will be coming soon to fix the bug, or
>>>> is
>>>>>> there a download somewhere that I'm not seeing?
>>>>>> 
>>>>>> Thanks
>>>>>> Mark
>>>>>> 
>>>>>> _______________________________________________
>>>>>> http://lurker.clamav.net/list/clamav-devel.html
>>>>>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>>>>>> 
>>>>>> http://www.clamav.net/contact.html#ml
>>>>>> 
>>>>> _______________________________________________
>>>>> http://lurker.clamav.net/list/clamav-devel.html
>>>>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>>>>> 
>>>>> http://www.clamav.net/contact.html#ml
>>>> 
>>>> _______________________________________________
>>>> http://lurker.clamav.net/list/clamav-devel.html
>>>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>>>> 
>>>> http://www.clamav.net/contact.html#ml
>>>> 
>>> _______________________________________________
>>> http://lurker.clamav.net/list/clamav-devel.html
>>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>>> 
>>> http://www.clamav.net/contact.html#ml
>> 
>> _______________________________________________
>> http://lurker.clamav.net/list/clamav-devel.html
>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>> 
>> http://www.clamav.net/contact.html#ml
>> 
> <pcre_flags_try.patch>_______________________________________________
> http://lurker.clamav.net/list/clamav-devel.html
> Please submit your patches to our Bugzilla: http://bugs.clamav.net
> 
> http://www.clamav.net/contact.html#ml




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