F5 BIG-IP 11.5.1 Application Security Manager cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

A vulnerability classified as problematic was found in F5 BIG-IP 11.5.1 (Firewall Software). Affected by this vulnerability is an unknown function of the component Application Security Manager. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in F5 BIG-IP Application Security Manager (ASM) before 11.6 allows remote attackers to inject arbitrary web script or HTML via the Response Body field when creating a new user account.

The weakness was published 01/12/2015 by Peter Lapp (Website). It is possible to read the advisory at xforce.iss.net. This vulnerability is known as CVE-2015-1050 since 01/15/2015. The exploitation appears to be easy. The attack can be launched remotely. The successful exploitation requires a single authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. The advisory points out:

The F5 ASM is a web application firewall designed to protect web applications from attacks. It allows for a custom HTML page to be displayed to end users when they trigger a violation. The configuration page for the custom response contains a text input for HTML and a "Show" button that allows the editor to preview the page. This functionality is vulnerable to Cross Site Scripting.

A public exploit has been developed by Peter Lapp and been published immediately after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 217 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 81597 (F5 Networks BIG-IP : ASM < 11.6.0 Response Body XSS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks. The advisory illustrates:

The HTML entered into the "Response Body" area is not sandboxed, which allows a malicious user to include JavaScript that would run in the context of the management console whenever a user clicks the "Show" button. The user could use XHR to bypass CSRF protections and perform commands on behalf of anyone that clicks the "Show" button.

Upgrading to version 11.6 eliminates this vulnerability. The advisory contains the following remark:

The vendor indicated the patch would not be backported to previous versions.

The vulnerability is also documented in the databases at X-Force (99907) and Tenable (81597). Similar entry is available at 68611.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Peter Lapp
Download: 🔍

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Nessus ID: 81597
Nessus Name: F5 Networks BIG-IP : ASM < 11.6.0 Response Body XSS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 800325
OpenVAS Name: F5 BIG-IP - ASM cross-site scripting (XSS) vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: BIG-IP 11.6

Timelineinfo

06/09/2014 🔍
06/18/2014 +9 days 🔍
01/12/2015 +208 days 🔍
01/12/2015 +0 days 🔍
01/12/2015 +0 days 🔍
01/13/2015 +1 days 🔍
01/15/2015 +2 days 🔍
01/15/2015 +0 days 🔍
01/16/2015 +1 days 🔍
01/19/2015 +3 days 🔍
02/25/2015 +37 days 🔍
03/02/2015 +5 days 🔍
03/02/2022 +2557 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: 129911
Researcher: Peter Lapp
Status: Confirmed

CVE: CVE-2015-1050 (🔍)
X-Force: 99907
SecurityTracker: 1031551 - F5 BIG-IP Application Security Manager Input Validation Flaw Permits Cross-Site Scripting Attacks
Vulnerability Center: 48762 - F5 Application Security Manager (ASM) before 11.6 Remote XSS via the Response Body Field, Low
SecurityFocus: 72014 - F5 Networks BIG-IP Application Security Manager (ASM) HTML Injection Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 01/19/2015 09:16
Updated: 03/02/2022 16:03
Changes: 01/19/2015 09:16 (81), 06/21/2017 09:22 (8), 03/02/2022 15:57 (3), 03/02/2022 16:03 (1)
Complete: 🔍

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