F5 BIG-IP 12.1.0/12.1.1/12.1.2 Access System Log cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as problematic, has been found in F5 BIG-IP 12.1.0/12.1.1/12.1.2 (Firewall Software). This issue affects an unknown functionality of the component Access System Log Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

In F5 BIG-IP APM 12.0.0 through 12.1.2, non-authenticated users may be able to inject JavaScript into a request that will then be rendered and executed in the context of the Administrative user when the Administrative user is viewing the Access System Logs, allowing the non-authenticated user to carry out a Cross Site Scripting (XSS) attack against the Administrative user.

The bug was discovered 05/05/2017. The weakness was published 05/09/2017 (Website). It is possible to read the advisory at support.f5.com. The identification of this vulnerability is CVE-2016-9257 since 11/09/2016. The attack may be initiated remotely. The successful exploitation needs a simple authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 100002 (F5 Networks BIG-IP : BIG-IP APM XSS vulnerability (K43523962)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371331 (F5 BIG-IP APM Cross-Site Scripting Vulnerability (K43523962)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (100002). Similar entries are available at 100954, 100953 and 100952.







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
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NVD Base Score: 6.1
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Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 100002
Nessus Name: F5 Networks BIG-IP : BIG-IP APM XSS vulnerability (K43523962)
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OpenVAS ID: 800325
OpenVAS Name: F5 BIG-IP - TMM vulnerability CVE-2016-9257
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


11/09/2016 🔍
05/05/2017 +177 days 🔍
05/05/2017 +0 days 🔍
05/08/2017 +3 days 🔍
05/09/2017 +1 days 🔍
05/09/2017 +0 days 🔍
05/09/2017 +0 days 🔍
12/06/2022 +2037 days 🔍


Vendor: f5.com

Advisory: K43523962
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9257 (🔍)
SecurityTracker: 1038416
OSVDB: - CVE-2016-9257 - F5 - Big-Ip Access Policy Manager - Medium

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Created: 05/09/2017 11:01 PM
Updated: 12/06/2022 09:03 AM
Changes: 05/09/2017 11:01 PM (70), 09/24/2020 06:11 PM (5), 12/22/2020 02:32 PM (2), 12/06/2022 09:03 AM (3)
Complete: 🔍


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