F5 Networks BIG-IP : NTP vulnerabilities (K17530)

medium Nessus Plugin ID 86773

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VPR Score: 4.7

Synopsis

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

Description

CVE-2015-7691

The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted packets containing particular autokey operations. NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

CVE-2015-7692 The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash). NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

CVE-2015-7702 The crypto_xmit function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash). NOTE: This vulnerability exists due to an incomplete fix for CVE-2014-9750.

Impact

An attacker may be able to craft a packet with particular autokey operations that upon receipt can cause ntpd to stop responding.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K17530.

See Also

https://support.f5.com/csp/article/K17530

https://www.tenable.com/security/research/tra-2015-04

Plugin Details

Severity: Medium

ID: 86773

File Name: f5_bigip_SOL17530.nasl

Version: 2.14

Type: local

Published: 11/6/2015

Updated: 1/4/2019

Dependencies: 76940

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 4.7

CVSS v2.0

Base Score: 5.8

Temporal Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: E:U/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:/h:f5:big-ip

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/2/2015

Reference Information

CVE: CVE-2014-9750, CVE-2015-7691, CVE-2015-7692, CVE-2015-7702