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Junos RADIUS Uninteded Authentication Vulnerability

Information

Severity

Severity

High

Family

Family

JunOS Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.5

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

9 years ago

Modified

Modified

5 years ago

Summary

JunOS is prone to a security bypass vulnerability

Insight

Insight

When a RADIUS authentication server is configured under [system radius-server], an entry is created in /var/etc/pam_radius.conf. An issue was discovered where RADIUS accounting servers configured under [system accounting destination radius] are also propagated to pam_radius.conf. If the same RADIUS server is used for both authentication and accounting - a common configuration - the issue is less severe since RADIUS authentication is sent to the intended server despite the duplicate entries. However, if the RADIUS authentication server is later removed from the configuration, the duplicate entry created by configuration of the RADIUS accounting server will remain in pam_radius.conf, also leading to possible unintended authentication success.

Affected Software

Affected Software

Junos OS 11.4, 12.1, 12.2, 12.3, 13.1, 13.2 and 13.3

Detection Method

Detection Method

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

Solution

Solution

New builds of Junos OS software are available from Juniper.

Common Vulnerabilities and Exposures (CVE)