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

Summary

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: https://exchange.xforce.ibmcloud.com/vulnerabilities/157514 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

Remediation/Fixes

Workarounds and Mitigations

None