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2017-10 Security Bulletin: ScreenOS: SSL Death Alert vulnerability impacts ScreenOS (CVE-2016-8610)

  [JSA10808] Show Article Properties


Product Affected:
This issue affects Juniper Networks ScreenOS 6.3.0 prior to 6.3.0r24.
Problem:

A denial of service flaw was found in the way the TLS/SSL protocol specifies processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make the ScreenOS TLS/SSL server consume an excessive amount of CPU time and trigger a denial of service condition for the ScreenOS device.

Affected releases are Juniper Networks ScreenOS 6.3.0 prior to 6.3.0r24.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue has been assigned CVE-2016-8610.

Solution:

The following software releases have been updated to resolve this specific issue: 6.3.0r24 and all subsequent releases.

This issue is being tracked as PR 1228608 and is visible on the Customer Support website.

Workaround:

Use access lists or firewall filters to limit access to the firewall's WebUI only from trusted hosts

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/screenos.html.
Modification History:
2017-10-11: Initial Publication.
Related Links:
CVSS Score:
5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
Risk Level:
Medium
Risk Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
Acknowledgements:
Juniper SIRT would like to acknowledge and thank
  • Shi Lei of Gear Team, Qihoo 360 Inc.