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2017-10 Security Bulletin: SRX Series: Embedded ICMP may cause the flowd process to crash (CVE-2017-10610)

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Article ID: JSA10813 SECURITY_ADVISORIES Last Updated: 11 Oct 2017Version: 1.0
Product Affected:
This issue affects Junos OS 12.1X46, 12.3X48, 15.1X49. Affected platforms: SRX Series.
Problem:

On SRX Series devices, a crafted ICMP packet embedded within a NAT64 IPv6 to IPv4 tunnel may cause the flowd process to crash. Repeated crashes of the flowd process constitutes an extended denial of service condition for the SRX Series device. This issue only occurs if NAT64 is configured.

No other Juniper Networks products or platforms are affected by this issue.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability, however, the issue has been seen in a production network.

This issue has been assigned CVE-2017-10610.
 

Solution:

The following software releases have been updated to resolve this specific issue: 12.1X46-D71, 12.3X48-D55, 15.1X49-D100, 17.3R1, and all subsequent releases.

This issue is being tracked as PR 1270680 and is visible on the Customer Support website.
 

Workaround:
No viable workaround exists for this issue.
 
Implementation:
Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of "PRs fixed" can be provided on request.
 
Modification History:
2017-10-11: Initial Publication.

CVSS Score:
7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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