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2017-07 Security Bulletin: Junos: Buffer overflow in sockets library (CVE-2017-2344)

  [JSA10792] Show Article Properties


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

A routine within an internal Junos OS sockets library is vulnerable to a buffer overflow. Malicious exploitation of this issue may lead to a denial of service (kernel panic) or be leveraged as a privilege escalation through local code execution. The routines are only accessible via programs running on the device itself, and veriexec restricts arbitrary programs from running on Junos OS. There are no known exploit vectors utilizing signed binaries shipped with Junos OS itself.

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-2017-2344.
 

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS 12.1X46-D67, 12.3R12-S6, 12.3R13, 12.3X48-D51, 12.3X48-D55, 13.3R10-S2, 14.1R2-S10, 14.1R8-S4, 14.1R9, 14.1X50-D185, 14.1X53-D45, 14.1X53-D75, 14.2R4-S9, 14.2R7-S7, 14.2R8, 15.1F2-S18, 15.1F5-S8, 15.1F6-S7, 15.1F7-S2, 15.1R4-S8, 15.1R5-S5, 15.1R6-S1, 15.1R7, 15.1X49-D100, 15.1X49-D110, 15.1X53-D107, 15.1X53-D231, 15.1X53-D47, 15.1X53-D48, 15.1X53-D57, 15.1X53-D64, 16.1R3-S4, 16.1R4-S3, 16.1R5, 16.2R2, 17.1R1-S3, 17.1R2, 17.2R1-S1, 17.2R2, 17.2X75-D30, 17.3R1, and all subsequent releases.

This issue is being tracked as PR 1282562 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:

Limit access to the Junos CLI only from trusted hosts and administrators.
 

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
  • 2017-10-30: Updated fixed releases
Related Links:
CVSS Score:
7.8 (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Risk Level:
High
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."