Vulnerability CVE-2020-27724

Vulnerability Name:

CVE-2020-27724 (CCN-193755)

Assigned:

2020-12-16

Published:

2020-12-16

Updated:

2020-12-28

Summary:

In BIG-IP APM versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, on systems running more than one TMM instance, authenticated VPN users may consume excessive resources by sending specially-crafted malicious traffic over the tunnel.

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/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): High Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)

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

4.9 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:N/I:N/A:C)

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

Vulnerability Type:

CWE-400

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2020-27724

Source: XF
Type: UNKNOWN
f5-cve202027724-dos(193755)

Source: CCN
Type: F5 Security Advisory K04518313
BIG-IP APM network access VPN vulnerability CVE-2020-27724

Source: MISC
Type: Vendor Advisory
https://support.f5.com/csp/article/K04518313

Vulnerable Configuration:

Configuration 1:

cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 11.6.1 and <= 11.6.5)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 12.1.0 and <= 12.1.5)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 13.1.0 and < 13.1.3.5)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 14.1.0 and < 14.1.3.1)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.0.1.4)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 15.1.0 and < 15.1.0.5)

OR cpe:/a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* (Version >= 16.0.0 and < 16.0.1)

Configuration CCN 1:

cpe:/a:f5:big-ip_access_policy_manager:12.1.0:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:14.1.0:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:15.0.0:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:15.0.1:*:*:*:*:*:*:*

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

OR cpe:/a:f5:big-ip_access_policy_manager:12.1.5:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:13.1.3:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:15.1.0:*:*:*:*:*:*:*

OR cpe:/a:f5:big-ip_access_policy_manager:16.0.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

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