Denial of service in Linux kernel ext3/ext4 file system in F5 BIG-IP



Published: 2021-03-12

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU47106

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14314

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists.

Mitigation

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

Vulnerable software versions

BIG-IP SSLO: 11.6.1 - 16.0.1.1

BIG-IP PEM: 11.6.1 - 16.0.1.1

BIG-IP Link Controller: 11.6.1 - 16.0.1.1

BIG-IP GTM: 11.6.1 - 16.0.1.1

BIG-IP FPS: 11.6.1 - 16.0.1.1

BIG-IP DNS: 11.6.1 - 16.0.1.1

BIG-IP DDHD: 11.6.1 - 16.0.1.1

BIG-IP APM: 11.6.1 - 16.0.1.1

BIG-IP Analytics: 11.6.1 - 16.0.1.1

BIG-IP AFM: 11.6.1 - 16.0.1.1

BIG-IP Advanced WAF: 11.6.1 - 16.0.1.1

BIG-IP AAM: 11.6.1 - 16.0.1.1

BIG-IP LTM: 11.6.1 - 16.0.1.1

BIG-IP: 11.6.1 - 16.0.1.1

BIG-IP ASM: 11.6.1 - 16.0.1.1

BIG-IQ Centralized Management: 6.0.0 - 8.0.0


CPE2.3 External links

http://support.f5.com/csp/article/K67830124

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



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