CVE-2017-2345

Junos: snmpd denial of service upon receipt of crafted SNMP packet

Description

On Junos OS devices with SNMP enabled, a network based attacker with unfiltered access to the RE can cause the Junos OS snmpd daemon to crash and restart by sending a crafted SNMP packet. Repeated crashes of the snmpd daemon can result in a partial denial of service condition. Additionally, it may be possible to craft a malicious SNMP packet in a way that can result in remote code execution. SNMP is disabled in Junos OS by default. Junos OS devices with SNMP disabled are not affected by this issue. No other Juniper Networks products or platforms are affected by this issue. NOTE: This is a different issue than Cisco CVE-2017-6736, CVE-2017-6737, and CVE-2017-6738. Affected releases are Juniper Networks Junos OS 12.1X46 prior to 12.1X46-D67; 12.3X48 prior to 12.3X48-D51, 12.3X48-D55; 13.3 prior to 13.3R10-S2; 14.1 prior to 14.1R2-S10, 14.1R8-S4, 14.1R9; 14.1X50 prior to 14.1X50-D185; 14.1X53 prior to 14.1X53-D122, 14.1X53-D44, 14.1X53-D50; 14.2 prior to 14.2R4-S9, 14.2R7-S7, 14.2R8; 15.1 prior to 15.1F2-S18, 15.1F6-S7, 15.1R4-S8, 15.1R5-S5, 15.1R6-S1, 15.1R7; 15.1X49 prior to 15.1X49-D100, 15.1X49-D110; 15.1X53 prior to 15.1X53-D231, 15.1X53-D47, 15.1X53-D48, 15.1X53-D57, 15.1X53-D64, 15.1X53-D70; 16.1 prior to 16.1R3-S4, 16.1R4-S3, 16.1R4-S4, 16.1R5; 16.2 prior to 16.2R2, 16.2R3; 17.1 prior to 17.1R1-S3, 17.1R2, 17.1R3; 17.2 prior to 17.2R1-S1, 17.2R2; 17.2X75 prior to 17.2X75-D30. Junos releases prior to 10.2 are not affected.

Remediation

Workaround:

  • Disable SNMP (disabled by default), utilize edge filtering with source-address validation (uRPF, etc.), SNMP access lists, and/or SNMPv3 authentication to limit access to the device only from trusted hosts.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.33% Top 15%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1038903 vdb entry third party advisory
https://kb.juniper.net/JSA10793 vendor advisory
http://www.securityfocus.com/bid/99567 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-2345?
CVE-2017-2345 has been scored as a critical severity vulnerability.
How to fix CVE-2017-2345?
As a workaround for remediating CVE-2017-2345: Disable SNMP (disabled by default), utilize edge filtering with source-address validation (uRPF, etc.), SNMP access lists, and/or SNMPv3 authentication to limit access to the device only from trusted hosts.
Is CVE-2017-2345 being actively exploited in the wild?
It is possible that CVE-2017-2345 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-2345?
CVE-2017-2345 affects Juniper Networks Junos OS, Juniper Networks Junos OS.
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