CVE-2017-10611

Junos: EX Series PFE and MX MPC7E/8E/9E PFE crash when fetching interface stats with 'extended-statistics' enabled

Description

If extended statistics are enabled via 'set chassis extended-statistics', when executing any operation that fetches interface statistics, including but not limited to SNMP GET requests, the pfem process or the FPC may crash and restart. Repeated crashes of PFE processing can result in an extended denial of service condition. This issue only affects the following platforms: (1) EX2200, EX3300, XRE200 (2) MX Series routers with MPC7E/8E/9E PFEs installed, and only if 'extended-statistics' are enabled under the [edit chassis] configuration. Affected releases are Juniper Networks Junos OS 14.1 prior to 14.1R8-S5, 14.1R9 on MX Series; 14.1X53 prior to 14.1X53-D46, 14.1X53-D50 on EX2200, EX3300, XRE200; 14.2 prior to 14.2R7-S9, 14.2R8 on MX Series; 15.1 prior to 15.1F5-S8, 15.1F6-S8, 15.1R5-S3, 15.1R6 on MX Series; 16.1 prior to 16.1R4-S5, 16.1R5, 16.1R6 on MX Series; 16.1X65 prior to 16.1X65-D45 on EX2200, EX3300, XRE200; 16.2 prior to 16.2R2-S1, 16.2R3 on MX Series; 17.1 prior to 17.1R2-S2, 17.1R3 on MX Series; 17.2 prior to 17.2R1-S3, 17.2R2 on MX Series; 17.2X75 prior to 17.2X75-D50 on MX Series; 17.3 prior to 17.3R1-S1, 17.3R2 on MX Series. No other Juniper Networks products or platforms are affected by this issue.

Remediation

Workaround:

Disable chassis extended-statistics. Use access lists or firewall filters to limit access to the router via SNMP or CLI only from trusted hosts and administrators.

6.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.25%

Vendor Advisory juniper.net

Affected: Juniper Networks Junos OS

References

Link	Tags
https://kb.juniper.net/JSA10814	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-10611?: CVE-2017-10611 has been scored as a medium severity vulnerability.
How to fix CVE-2017-10611?: As a workaround for remediating CVE-2017-10611: Disable chassis extended-statistics. Use access lists or firewall filters to limit access to the router via SNMP or CLI only from trusted hosts and administrators.
Is CVE-2017-10611 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-10611 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-10611?: CVE-2017-10611 affects Juniper Networks Junos OS, Juniper Networks Junos OS.