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AUSCERT External Security Bulletin Redistribution
ESB-2015.1807
2015-07 Security Bulletin: Junos: SRX Network Security
Daemon denial of service vulnerability (CVE-2015-5363)
9 July 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Juniper SRX Series services gateways
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-5363
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10692
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2015-07 Security Bulletin: Junos: SRX Network Security Daemon denial of
service vulnerability (CVE-2015-5363)
[JSA10692]
PRODUCT AFFECTED:
This issue can affect all SRX Series services gateways.
PROBLEM:
The SRX Network Security Daemon (nsd) in SRX Series services gateways is
susceptible to a denial of service vulnerability. This issue can happen while
processing certain DNS response messages for name resolution requests
initiated by the SRX device. An attack would require a rogue DNS server.
Repeated crashes of the nsd process would prevent SRX's security subsystem
from functioning properly. If this condition occurs, security-related
configurations cannot be committed and security-related 'show' commands do not
work. For example:
user@srx> show security zones
error: the network-security subsystem is not running
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
No other Juniper Networks products or platforms are affected by this issue.
This issue has been assigned CVE-2015-5363.
SOLUTION:
The following software releases have been updated to resolve this specific
issue: Junos OS 12.1X44-D50, 12.1X46-D35, 12.1X47-D25, 12.3X48-D15, and all
subsequent releases.
This issue is being tracked as PR 1067941 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:
No known workaround exists for this issue.
IMPLEMENTATION:
How to obtain fixed software:
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:
2015-07-08: Initial publication
RELATED LINKS:
KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin
Publication Process
KB16765: In which releases are vulnerabilities fixed?
KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security
Advisories
Report a Vulnerability - How to Contact the Juniper Networks Security Incident
Response Team
CVE-2015-5363: SRX Network Security Daemon denial of service vulnerability
CVSS SCORE:
CVSSv2: 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
RISK LEVEL:
Medium
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."
ACKNOWLEDGEMENTS:
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