Executive Summary
Summary | |
---|---|
Title | F5 BIG-IP contains multiple vulnerabilities including unauthenticated remote command execution |
Informations | |||
---|---|---|---|
Name | VU#290915 | First vendor Publication | 2020-07-08 |
Vendor | VU-CERT | Last vendor Modification | 2020-07-13 |
Severity (Vendor) | N/A | Revision | M |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | |||
---|---|---|---|
Overall CVSS Score | 9.8 | ||
Base Score | 9.8 | Environmental Score | 9.8 |
impact SubScore | 5.9 | Temporal Score | 9.8 |
Exploitabality Sub Score | 3.9 | ||
Attack Vector | Network | Attack Complexity | Low |
Privileges Required | None | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | High |
Integrity Impact | High | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C) | |||
---|---|---|---|
Cvss Base Score | 10 | Attack Range | Network |
Cvss Impact Score | 10 | Attack Complexity | Low |
Cvss Expoit Score | 10 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
OverviewF5 BIG-IP provides a Traffic Management User Interface (TMUI), also referred to as the Configuration utility, that has multiple vulnerabilities including a remotely exploitable command injection vulnerability that can be used to execute arbitrary commands and subsequently take control of a vulnerable system. DescriptionF5 BIG-IP devices provide load-balancing capability to application services such as HTTP and DNS. The F5 BIG-IP TMUI management web interface improperly neutralizes untrusted user input and can be abused by unauthenticated remote attackers to perform malicious activities such as cross-site scripting (XSS), cross-site request forgery (CSRF), and command injection CWE-74. F5 has also announced that BIG-IP devices do not properly enforce access controls to sensitive configuration files that be read and overwritten by an authenticated user via Secure Copy (SCP). The vulnerability identified by CVE-2020-0592 can be abused to achieve arbitrary code execution on the target device with root privileges. Underlying causes and factors in these vulnerabilities include:
F5 recommends that the TMUI web interface should be accessible only from a secure or an out-of-band network and not directly from the Internet (K13092). However, many installations, as observed by Bad Packets, do not seem to follow this recommendation. ImpactAn unauthenticated attacker with network access to the TMUI may be able to execute arbitrary system commands, create or delete files, disable services, and subsequently execute arbitrary code with high privileges such as root. An authenticated user is also be able to perform unexpected activities such as changing configuration files on a vulnerable device. SolutionApply updatesF5 has provided updated software for the several impacted versions of BIG-IP devices. Note that BIG-IP appliances as well as virtual instances are also vulnerable as identified by F5 advisories. It is highly recommended that you upgrade to the latest secure and stable software provided by F5. These updates are essential to your device's security, even if the TMUI is not accessible over the Internet. The upgrade reduces the risk to your device being compromised using CSRF or XSS attacks. WorkaroundsIn many cases, an attack against BIG-IP's recent vulnerabilities require access to TMUI. Blocking or disabling access to TMUI from untrusted networks is highly recommended. F5 has also provided multiple temporary workaround options in their advisory. AcknowledgementsSeveral of these vulnerabilities were reported by Mikhail Klyuchnikov of Positive Technologies, who worked with F5 on a coordinated disclosure. This document was written by Vijay Sarvepalli. |
Original Source
Url : https://kb.cert.org/vuls/id/290915 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
33 % | CWE-79 | Failure to Preserve Web Page Structure ('Cross-site Scripting') (CWE/SANS Top 25) |
17 % | CWE-532 | Information Leak Through Log Files |
17 % | CWE-352 | Cross-Site Request Forgery (CSRF) (CWE/SANS Top 25) |
17 % | CWE-276 | Incorrect Default Permissions |
17 % | CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE/SANS Top 25) |
CPE : Common Platform Enumeration
Snort® IPS/IDS
Date | Description |
---|---|
2020-08-11 | F5 BIG-IP Traffic Management User Interface remote code execution attempt RuleID : 54484 - Revision : 2 - Type : SERVER-WEBAPP |
2020-08-06 | F5 BIG-IP Traffic Management User Interface remote code execution attempt RuleID : 54462 - Revision : 3 - Type : SERVER-WEBAPP |
Alert History
Date | Informations |
---|---|
2020-07-13 17:17:27 |
|
2020-07-09 00:28:23 |
|
2020-07-09 00:17:28 |
|