F5 BIG-IP up to 14.1.0.1 Filesystem access control

Summaryinfo

A vulnerability classified as critical has been found in F5 BIG-IP up to 11.5.8/11.6.3.4/12.1.4/13.1.1.4/14.1.0.1. This impacts an unknown function of the component Filesystem. Performing a manipulation results in access control. This vulnerability is known as CVE-2019-6618. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.5.8/11.6.3.4/12.1.4/13.1.1.4/14.1.0.1 (Firewall Software). It has been classified as critical. This affects some unknown processing of the component Filesystem. 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 integrity, and availability. The summary by CVE is:

On BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8, users with the Resource Administrator role can modify sensitive portions of the filesystem if provided Advanced Shell Access, such as editing /etc/passwd. This allows modifications to user objects and is contrary to our definition for the Resource Administrator (RA) role restrictions.

The bug was discovered 05/01/2019. The weakness was published 05/03/2019 (Website). The advisory is shared at support.f5.com. This vulnerability is uniquely identified as CVE-2019-6618 since 01/22/2019. It is possible to initiate the attack remotely. Required for exploitation is a authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/12/2023). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371787 (F5 BIG-IP ASM,LTM,APM BIG-IP Resource Administrator vulnerability(K07702240)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entries are available at VDB-134386, VDB-134384, VDB-134383 and VDB-134382. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.5.6
• 11.5.7
• 11.5.8
• 11.6.3.0
• 11.6.3.1
• 11.6.3.2
• 11.6.3.3
• 11.6.3.4
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 12.1.4
• 13.1.1.0
• 13.1.1.1
• 13.1.1.2
• 13.1.1.3
• 13.1.1.4
• 14.1.0.0
• 14.1.0.1

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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