Hi,
Thanks for pointing this out. Are you able to provide a patch for this?
Is it enough to insert something like:
outLen = PDF_MAX(outLen, 16) ?
Regards,
Dom
On Fri, Jul 12, 2013 at 3:07 AM, Vladislav Folts <vfo...@meta-comm.com>wrote:
> Please see these lines at PdfTokenizer::ReadString:
> pdf_long outLen = m_vecBuffer.size() -
> pEncrypt->CalculateStreamOffset();
> char * outBuffer = new char[outLen];
> pEncrypt->Decrypt( reinterpret_cast<unsigned
> char*>(&(m_vecBuffer[0])),
> static_cast<unsigned
> int>(m_vecBuffer.size()),
> reinterpret_cast<unsigned char*>(outBuffer),
> outLen);
>
> The size may calculate incorrectly (too small). Underlying AES encoding
> expects output buffer at least 16 bytes long (or divisible by 16 - I'm not
> sure, the code is not so clear).
> In my particular case "outLen" became equal 7 and buffer overrun happens
> in AES_cbc_encrypt (in openssl). I hope you will be able to fix it soon.
>
> Thank you.
>
> --
> Vladislav Folts
> MetaCommunications Engineering
>
>
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