Knowledge Search


×
 

2017-07 Security Bulletin: Junos: snmpd denial of service upon receipt of crafted SNMP packet (CVE-2017-2345)

  [JSA10793] Show Article Properties


Product Affected:
This issue affects Juniper Networks Junos OS 10.2 and above on all products and platforms.
Problem:

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

This issue has been assigned CVE-2017-2345.

NOTE: This is a different issue than Cisco CVE-2017-6736, CVE-2017-6737, and CVE-2017-6738.
 

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS 12.1X46-D67, 12.3X48-D51, 12.3X48-D55, 13.3R10-S2, 14.1R2-S10, 14.1R8-S4, 14.1R9, 14.1X53-D122, 14.1X53-D44, 14.1X53-D50, 14.2R7-S7, 14.2R8, 15.1F2-S18, 15.1F6-S7, 15.1R4-S8, 15.1R5-S5, 15.1R6-S1, 15.1R7, 15.1X49-D100, 15.1X53-D231, 15.1X53-D47, 15.1X53-D48, 15.1X53-D57, 15.1X53-D64, 15.1X53-D70, 16.1R3-S4, 16.1R4-S3, 16.1R5, 16.2R2, 17.1R1-S3, 17.1R2, 17.2R1-S1, 17.2R2, 17.3R1, and all subsequent releases.

This issue is being tracked as PR 1282772 and is visible on the Customer Support website.

KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.
 

Workaround:

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

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:
  • 2017-07-12: Initial Publication
  • 2017-08-07: Clarified workaround to reference ACLs rather than SNMP access lists
Related Links:
CVSS Score:
9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Risk Level:
Critical
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."