Vulnerability CVE-2018-5527

Vulnerability Name:

CVE-2018-5527 (CCN-145518)

Assigned:

2018-06-27

Published:

2018-06-27

Updated:

2019-10-03

Summary:

On BIG-IP 13.1.0-13.1.0.7, a remote attacker using undisclosed methods against virtual servers configured with a Client SSL or Server SSL profile that has the SSL Forward Proxy feature enabled can force the Traffic Management Microkernel (tmm) to leak memory. As a result, system memory usage increases over time, which may eventually cause a decrease in performance or a system reboot due to memory exhaustion.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-772

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-5527

Source: CCN
Type: SECTRACK ID: 1041196
F5 BIG-IP SSL Forward Proxy Flaw Lets Remote Users Consume Excessive Memory Resources

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1041196

Source: XF
Type: UNKNOWN
f5-cve20185527-dos(145518)

Source: CCN
Type: F5 Security Advisory K20134942
SSL Forward Proxy vulnerability CVE-2018-5527

Source: CONFIRM
Type: Vendor Advisory
https://support.f5.com/csp/article/K20134942

Vulnerable Configuration:

Configuration 1:

cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_analytics:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

OR cpe:/a:f5:big-ip_websafe:*:*:*:*:*:*:*:* (Version >= 13.0.0 and <= 13.1.0.7)

Configuration CCN 1:

cpe:/a:f5:big-ip:13.0.0:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip:13.1.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

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