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F5 Networks BIG-IP : Linux libuser vulnerability (SOL05770600)

medium Nessus Plugin ID 91327

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification.
NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution SOL05770600.

See Also

https://support.f5.com/csp/article/K05770600

Plugin Details

Severity: Medium

ID: 91327

File Name: f5_bigip_SOL05770600.nasl

Version: 2.17

Type: Local

Published: 5/26/2016

Updated: 8/26/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.35

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2015-3246

CVSS v3

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 4.9

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/a:f5:big-ip_wan_optimization_manager, cpe:/a:f5:big-ip_webaccelerator, cpe:/h:f5:big-ip, cpe:/h:f5:big-ip_protocol_security_manager

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/2/2015

Vulnerability Publication Date: 8/11/2015

CISA Known Exploited Vulnerability Due Dates: 9/9/2026

Exploitable With

Core Impact

Metasploit (Libuser roothelper Privilege Escalation)

Reference Information

CVE: CVE-2015-3245, CVE-2015-3246

BID: 76021, 76022

IAVA: 2015-A-0179