Denial of service in glibc implementation in F5 BIG-IP and F5OS



Published: 2021-03-14
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE ID CVE-2020-29573
CWE ID CWE-787
Exploitation vector Network
Public exploit N/A
Vulnerable software
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BIG-IP
Hardware solutions / Firmware

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

F5OS
Operating systems & Components / Operating system

Vendor F5 Networks, Inc.

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Out-of-bounds write

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-29573

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary within the sysdeps/i386/ldbl2mpn.c in the GNU C Library on x86  systems. A remote attacker can pass specially crafted data to the application that uses the vulnerable version of glibc and crash it.

Mitigation

Install update from vendor's website.

Vulnerable software versions

BIG-IP: 11.6.1, 11.6.1 HF1, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.0, 12.1.3.1, 12.1.3.2, 12.1.3.7, 12.1.4, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 13.1.0, 13.1.0.4, 13.1.1, 13.1.1.2, 13.1.3, 13.1.3.2, 13.1.3.4, 13.1.3.5, 13.1.3.6, 14.1.0, 14.1.0.3.0.79.6-ENG Hotfix, 14.1.0.3.0.97.6-ENG Hotfix, 14.1.0.3.0.99.6-ENG Hotfix, 14.1.0.5.0.15.5-ENG Hotfix, 14.1.0.5.0.36.5-ENG Hotfix, 14.1.0.5.0.40.5-ENG Hotfix, 14.1.0.6.0.11.9-ENG Hotfix, 14.1.0.6.0.14.9-ENG Hotfix, 14.1.0.6.0.68.9-ENG Hotfix, 14.1.0.6.0.70.9-ENG Hotfix, 14.1.1, 14.1.2, 14.1.2-0.89.37, 14.1.2.0.11.37-ENG Hotfix, 14.1.2.0.18.37-ENG Hotfix, 14.1.2.0.32.37-ENG Hotfix, 14.1.2.1, 14.1.2.1.0.14.4-ENG Hotfix, 14.1.2.1.0.16.4-ENG Hotfix, 14.1.2.1.0.34.4-ENG Hotfix, 14.1.2.1.0.46.4-ENG Hotfix, 14.1.2.1.0.97.4-ENG Hotfix, 14.1.2.1.0.99.4-ENG Hotfix, 14.1.2.1.0.105.4-ENG Hotfix, 14.1.2.1.0.111.4-ENG Hotfix, 14.1.2.1.0.115.4-ENG Hotfix, 14.1.2.1.0.122.4-ENG Hotfix, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 16.0.0, 16.0.1, 16.0.1.1

BIG-IQ Centralized Management: 6.0.0, 6.0.1, 6.1.0, 7.0.0, 7.0.0.2, 7.1.0, 7.1.0.3, 8.0.0

F5OS: 1.0.0

CPE External links

https://support.f5.com/csp/article/K27238230

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.



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