Re: CVE for crypto_get_random() from libsrtp

[Michael Samuel <mik () miknet net>]

Hi,

I can't see any reference to it using 80 bits of random data - it looks
like it's AES-CTR mode.  Do you have further information on that?

That being said, I can see quite a few ways it can go wrong - it's doesn't
appear thread-safe for a start.  Is it worth taking a closer look or are
you planning on shipping the patch anyway?

Regards,
  Michael

On 31 July 2015 at 22:47, Adam Maris <amaris () redhat com> wrote:

> Hello,
>
> I've got question whether this bug (
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=793971) is CVE-worthy?
> Could it be classified as CWE-330: Use of Insufficiently Random Values?
>
> According to the SRTP documentation (
> http://srtp.sourcearchive.com/documentation/1.4.2.dfsg/group__SRTP_g1d4c228c6a58096dfab3cefbabd66f17.html),
> it provides 80 bits of random data, which is quite a borderline.
>
> Thanks.
>
> --
> Adam Maris / Red Hat Product Security