Junos Fail-Open Unauthenticated Root Access Vulnerability

Published: 2015-11-23 03:20:35
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 is prone to a unauthenticated root access vulnerability.

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

Technical Details:
When the pam.conf file is corrupted in certain ways, it may allow connection to the device as the root user with no password. This 'fail-open' behavior allows an attacker who can specifically modify the file to gain full access to the device. Note that inadvertent manipulation of the pam.conf by an authorized administrator can also lead to unauthenticated root access to the device.

Impact:
When the pam.conf file is corrupted in certain ways attackers may connect as root user with no password.

Affected Versions:
Junos OS 12.1, 12.3, 13.2, 13.3, and 14.1

Recommendations:
New builds of Junos OS software are available from Juniper.

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

https://nvd.nist.gov/vuln/detail/CVE-2015-7751

References:

http://kb.juniper.net/JSA10707

Severity
Medium
CVSS Score
6.9
Published
2015-11-23
Modified
2019-05-24
Category
JunOS Local Security Checks

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