Junos SRX Series: Possible Unauthenticated Root Login Vulnerability

Published: 2016-07-14 03:16:23
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

Summary:
Junos OS on SRX series is prone to a possible unauthenticated root login vulnerability

Detection Method:
Checks if a vulnerable OS build is present on the target host.

Technical Details:
Using the 'request system software' command with the 'partition' option on an SRX Series device upgrading to Junos OS 12.1X46 can leave the system in a state where root CLI login is allowed without a password due to the system reverting to a 'safe mode' authentication triggered by the failed upgrade. Additionally, valid authentication credentials fail to work due to the same issue. Only root with no password will work. This issue only affects SRX Series devices upgraded to Junos OS 12.1X46 releases. No other platform or version of Junos OS is affected by this vulnerability, and no other Juniper Networks products or platforms are affected by this issue.

Impact:
A local attacker may gain root access.

Affected Versions:
Junos OS 12.1X46 on SRX Series

Recommendations:
New builds of Junos OS software are available from Juniper. As a workaround avoid using the 'partition' option when upgrading an SRX Series device to Junos OS 12.1X46 prior to 12.1X46-D50.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-1278

References:

http://kb.juniper.net/JSA10753

Severity
Medium
CVSS Score
6.9
Published
2016-07-14
Modified
2018-11-12
Category
JunOS Local Security Checks

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