F5 BIG-IP up to 11.6.3.1/12.1.3.3/13.1.0.5 TMOS Shell access control

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in F5 BIG-IP up to 11.6.3.1/12.1.3.3/13.1.0.5. This issue affects some unknown processing of the component TMOS Shell. The manipulation results in access control. This vulnerability is known as CVE-2018-5520. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.6.3.1/12.1.3.3/13.1.0.5 (Firewall Software). It has been classified as critical. Affected is an unknown part of the component TMOS Shell. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

On an F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.1, or 11.2.1-11.6.3.1 system configured in Appliance mode, the TMOS Shell (tmsh) may allow an administrative user to use the dig utility to gain unauthorized access to file system resources.

The bug was discovered 05/01/2018. The weakness was published 05/02/2018 (Website). The advisory is available at support.f5.com. This vulnerability is traded as CVE-2018-5520 since 01/12/2018. It is possible to launch the attack remotely. A authentication is necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 118616 (F5 Networks BIG-IP : Appliance mode tmsh access vulnerability (K02043709)), 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 370959 (F5 BIG-IP ASM Appliance Mode tmsh Access Vulnerability (K02043709)).

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

The vulnerability is also documented in the vulnerability database at Tenable (118616). Similar entries are available at VDB-117329, VDB-117328 and VDB-117327. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118616
Nessus Name: F5 Networks BIG-IP : Appliance mode tmsh access vulnerability (K02043709)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/12/2018 🔍
04/30/2018 +108 days 🔍
05/01/2018 +1 days 🔍
05/02/2018 +0 days 🔍
05/02/2018 +0 days 🔍
05/03/2018 +1 days 🔍
11/02/2018 +183 days 🔍
03/08/2023 +1587 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K02043709
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-5520 (🔍)
GCVE (CVE): GCVE-0-2018-5520
GCVE (VulDB): GCVE-100-117330
SecurityTracker: 1040798

See also: 🔍

Entryinfo

Created: 05/03/2018 10:37
Updated: 03/08/2023 15:03
Changes: 05/03/2018 10:37 (62), 02/02/2020 10:03 (8), 03/08/2023 15:03 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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