Infinite loop in python tarfile library in F5 BIG-IP products



Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-20907
CWE-ID CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 F5OS
Operating systems & Components / Operating system

BIG-IP
Hardware solutions / Firmware

BIG-IQ Centralized Management
Server applications / Remote management servers, RDP, SSH

Vendor F5 Networks

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU32881

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20907

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop In Lib/tarfile.py in Python. A remote attacker can create a specially crafted TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

F5OS: 1.1.0 - 1.1.2

BIG-IP: 12.1.0 - 16.0.1.1.9.6

BIG-IQ Centralized Management: 6.0.1 - 8.0.0

CPE2.3 External links

https://support.f5.com/csp/article/K78284681


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###