A vulnerability 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 (Firewall Software) and classified as critical. Affected by this vulnerability is an unknown code of the component Appliance Mode. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, 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, administrative users with TMSH access can overwrite critical system files on BIG-IP which can result in bypass of whitelist / blacklist restrictions enforced by appliance mode.

The bug was discovered 05/01/2019. The weakness was presented 05/03/2019 (Website). It is possible to read the advisory at support.f5.com. This vulnerability is known as CVE-2019-6616 since 01/22/2019. The attack can be launched remotely. A single authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/12/2023). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

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 371793 (F5 BIG-IP ASM,LTM,APM Appliance Mode tmsh Privilege Escalation Vulnerability(K82814400)).

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

See 134386, 134384, 134382 and 134381 for similar entries.

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

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion