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             AUSCERT External Security Bulletin Redistribution

  Security Bulletin: OpenSSL vulnerabilites impacting IBM Aspera Connect
             3.7.4 and earlier (CVE-2017-3732, CVE-2016-7055)
                             15 November 2019


        AusCERT Security Bulletin Summary

Product:           IBM Aspera Connect
Publisher:         IBM
Operating System:  Linux variants
                   Mac OS
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-3732 CVE-2016-7055 CVE-2015-3193

Reference:         ASB-2018.0013

Original Bulletin: 

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OpenSSL vulnerabilites impacting IBM Aspera Connect 3.7.4 and earlier
(CVE-2017-3732, CVE-2016-7055)

Security Bulletin


The OpenSSL vulnerabilities CVE-2017-3732 CVE-2016-7055 impact IBM Aspera
Connect version 3.7.4 and earlier. The fix is delivered in IBM Aspera Connect

Vulnerability Details

CVEID: CVE-2017-3732
DESCRIPTION: There is a carry propagating bug in the x86_64 Montgomery squaring
procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. No EC
algorithms are affected. Analysis suggests that attacks against RSA and DSA as
a result of this defect would be very difficult to perform and are not believed
likely. Attacks against DH are considered just feasible (although very
difficult) because most of the work necessary to deduce information about a
private key may be performed offline. The amount of resources required for such
an attack would be very significant and likely only accessible to a limited
number of attackers. An attacker would additionally need online access to an
unpatched system using the target private key in a scenario with persistent DH
parameters and a private key that is shared between multiple clients. For
example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites.
Note: This issue is very similar to CVE-2015-3193 but must be treated as a
separate problem.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
121313 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-7055
DESCRIPTION: There is a carry propagating bug in the Broadwell-specific
Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c
that handles input lengths divisible by, but longer than 256 bits. Analysis
suggests that attacks against RSA, DSA and DH private keys are impossible. This
is because the subroutine in question is not used in operations with the
private key itself and an input of the attacker's direct choice. Otherwise the
bug can manifest itself as transient authentication and key negotiation
failures or reproducible erroneous outcome of public-key operations with
specially crafted input. Among EC algorithms only Brainpool P-512 curves are
affected and one presumably can attack ECDH key negotiation. Impact was not
analyzed in detail, because pre-requisites for attack are considered unlikely.
Namely multiple clients have to choose the curve in question and the server has
to share the private key among them, neither of which is default behaviour.
Even then only clients that chose the curve will be affected.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
118748 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

|Affected Product(s) |Version(s)|
|Connect             |3.7.4     |


The fix for this set of vulnerabilities was delivered in IBM Aspera Connect

Workarounds and Mitigations

The fix for this set of vulnerabilities was delivered in IBM Aspera Connect

Get Notified about Future Security Bulletins


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