QID 375681

Date Published: 2021-08-11

QID 375681: F5 BIG-IP LTM,ASM BIG-IP CURL Vulnerability (K41523201)

F5 BIG-IP ASM (Application Security Manager) is a flexible web application firewall that secures web applications in traditional, virtual, and private cloud environments.
F5 BIG-IP (LTM) Local Traffic Manager is the most popular module offered on F5 Networks BIG-IP platform. The real power of the LTM is it is a Full Proxy, allowing you to augment client and server side connections. All while making informed load balancing decisions on availability, performance, and persistence.

Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

Vulnerable Component: BIG-IP ASM, LTM

Affected Versions:
16.0.0 - 16.0.1.1
15.1.0 - 15.1.3
14.1.0 - 14.1.4.1
13.1.0 - 13.1.3
12.1.0 - 12.1.6
11.6.1 - 11.6.5

QID Detection Logic(Authenticated):
This QID checks for the vulnerable versions of F5 BIG-IP devices using the tmsh command.

An attacker could cause a Denial Of Service (DoS) or arbitrary code execution if you use cURL to transfer data to or from a Trivial File Transport Protocol (TFTP) server and set the blksize (block size) option to a value below 504 (the default value is 512). Setting a smaller block size than the default should be rare as the primary use case for changing the block size is to make it larger.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as High - 7.5 severity.
  • Solution
    The vendor has released patch, for more information please visit: K41523201
    Vendor References

    CVEs related to QID 375681

    Software Advisories
    Advisory ID Software Component Link
    K41523201 URL Logo support.f5.com/csp/article/K41523201