IBM Support

Security Bulletin: OpenSSL vulnerabilites impacting Aspera High-Speed Transfer Server, Aspera Desktop Client 3.9.1 and earlier (CVE-2019-1559)

Security Bulletin


The OpenSSL vulnerabilities CVE-2019-1559 impact Aspera High-Speed Transfer Server 3.9.1 and earlier, Aspera Desktop Client 3.9.1 and earlier. The fix is delivered in Aspera High-Speed Transfer Server 3.9.3, Aspera Desktop Client 3.9.3.

Vulnerability Details

CVEID:   CVE-2019-1559
DESCRIPTION:   If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).
CVSS Base score: 5.8
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s) Version(s)
IBM Aspera High-Speed Transfer Server 3.9.1 and earlier
IBM Aspera High-Speed Transfer Endpoint 3.9.1 and earlier
IBM Aspera Desktop Client 3.9.1 and earlier


Affected Product(s) Fix in Version(s)
IBM Aspera High-Speed Transfer Server 3.9.6
IBM Aspera High-Speed Transfer Endpoint 3.9.6
IBM Aspera Desktop Client 3.9.6

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

14 Nov 2019: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSHH7W","label":"IBM Aspera Sync"},"ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Version(s)","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
24 April 2020