Re: openssl-users Digest, Vol 43, Issue 16

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Re: openssl-users Digest, Vol 43, Issue 16



ในวันที่ พ. 13 มิ.ย. 2018 12:51 <[hidden email]> เขียนว่า:
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Today's Topics:

   1. OpenSSL Security Advisory (OpenSSL)
   2. Re: OpenSSL 1.1.0: How to get X509_STORE from X509_LOOKUP?
      (Matt Caswell)
   3. Re: 2 openssl installed? (Jan Just Keijser)
   4. Re: Advantech openssl compatibility issue (Brian.Chou)


Message: 1
Date: Tue, 12 Jun 2018 10:18:03 +0000
From: OpenSSL <[hidden email]>
To: [hidden email], OpenSSL User Support ML
        <[hidden email]>, OpenSSL Announce ML
        <[hidden email]>
Subject: [openssl-users] OpenSSL Security Advisory
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=us-ascii

Hash: SHA512

OpenSSL Security Advisory [12 June 2018]

Client DoS due to large DH parameter (CVE-2018-0732)

Severity: Low

During key agreement in a TLS handshake using a DH(E) based ciphersuite a
malicious server can send a very large prime value to the client. This will
cause the client to spend an unreasonably long period of time generating a key
for this prime resulting in a hang until the client has finished. This could be
exploited in a Denial Of Service attack.

Due to the low severity of this issue we are not issuing a new release of
OpenSSL 1.1.0 or 1.0.2 at this time. The fix will be included in OpenSSL 1.1.0i
and OpenSSL 1.0.2p when they become available. The fix is also available in
commit ea7abeeab (for 1.1.0) and commit 3984ef0b7 (for 1.0.2) in the OpenSSL git

This issue was reported to OpenSSL on 5th June 2018 by Guido Vranken who also
developed the fix.


URL for this Security Advisory:

Note: the online version of the advisory may be updated with additional details
over time.

For details of OpenSSL severity classifications please see:



Message: 2
Date: Tue, 12 Jun 2018 11:32:21 +0100
From: Matt Caswell <[hidden email]>
To: [hidden email]
Subject: Re: [openssl-users] OpenSSL 1.1.0: How to get X509_STORE from
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8

On 12/06/18 10:58, Stephan M?hlstrasser wrote:
> In OpenSSL 1.0.2 this was no problem as the "X509_STORE *store_ctx"
> member of the X509_LOOKUP structure was directly accessible. But in
> OpenSSL 1.1.0 the X509_LOOKUP structure is opaque, and as far as I can
> see there is no API function available that would retrieve the
> X509_STORE pointer from a X509_LOOKUP pointer.
> Is this intentional, or was this an omission when making the X509_LOOKUP
> structure opaque in OpenSSL 1.1.0?

It was an omission that is fixed in the latest dev version of OpenSSL
1.1.0. See this commit:

This will be in 1.1.0i when it gets released (no released date as yet).



Message: 3
Date: Tue, 12 Jun 2018 18:30:08 +0200
From: Jan Just Keijser <[hidden email]>
To: [hidden email], Sampei <[hidden email]>
Subject: Re: [openssl-users] 2 openssl installed?
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed


On 07/06/18 06:14, Sampei wrote:
> t?s a server installed many many years ago and there are applications
> which are no used.
> Server is too late and I have new server (latest Centos 6) for
> migrating where I installed latest version.
> I?d like to take to new server all certificate database (certificated
> included) which I created.
> Openssl is only tool to create test certificates.
> I don?t know if there are apps which are using the e configs, but I
> think no.
this has little to do with OpenSSL itself and more with PKI management.
Basically, your problem seems to be that you have an older server and
you don't know where the certificates and private keys (i.e. the PKI)
were stored. What you need to do, is find out where the certifcates are
held, together with the index.txt file. In order to do so, you could use
something like
 ? find / -name '*.pem'
 ? find / -name index.txt
and check all directories where such files are found. This will be a
lengthy process, as the find command has to traverse the entire filesystem.

good luck,



Message: 4
Date: Wed, 13 Jun 2018 05:40:01 +0000
From: Brian.Chou <[hidden email]>
To: "[hidden email]" <[hidden email]>
Cc: "Brian.Ng" <[hidden email]>, "Mojo.Huang"
        <[hidden email]>
Subject: Re: [openssl-users] Advantech openssl compatibility issue
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="us-ascii"

Subscribe and send again.

From: Brian.Chou
Sent: Wednesday, June 13, 2018 1:21 PM
To: '[hidden email]'
Cc: Brian.Ng; Mojo.Huang
Subject: Advantech openssl compatibility issue

Dear support team

  We met openssl crash issue on our Intel Atom C3000 SoC platform.
Openssl crashes when run "s_client -connect IP:Port" command.
In win10 event viewer it show "Faulting module name:LIBEAY32.dll, version:". (Figure 1)
The issue only happened to "1.0.2h" or older version. (Table 1)
And other CPU/Chipset on our side can work normally with same command.
Can you help to explain what changes are made between "1.0.2h" and "1.0.2i" that may cause this issue?
Please let me know if you need more info, thank you.

Note: We found similar issue by google, not sure if it's related. (<>)

Table 1.Test under Winsvr 2016/Win10
Openssl version

Connect by "s_client -connect IP:Port"











Figure 1
Best regards,
Brian Chou
Application Engineering of Industrial IoT Group
Advantech Co., Ltd.
Tel: 886-2-2792-7818 ext,1431
[hidden email]<mailto:[hidden email]>

Best regards,
Brian Chou
Application Engineering of Industrial IoT Group
Advantech Co., Ltd.
Tel: 886-2-2792-7818 ext,1431
[hidden email]<mailto:[hidden email]>

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