PT-2020-18778 · F5 · Big-Ip

Published 2020-04-30 · Updated 2021-07-21 · CVE-2020-5877

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions 11.6.1 through 11.6.5.1 F5 BIG-IP versions 12.1.0 through 12.1.5.1 F5 BIG-IP versions 13.1.0 through 13.1.3.3 F5 BIG-IP versions 14.1.0 through 14.1.2.3 F5 BIG-IP versions 15.0.0 through 15.1.0.1

Description The issue arises from malformed input to the DATAGRAM::tcp iRules command within a FLOW INIT event, potentially leading to a denial of service.

Recommendations For versions 11.6.1 through 11.6.5.1, consider disabling the DATAGRAM::tcp iRules command within a FLOW INIT event as a temporary workaround until a patch is available. For versions 12.1.0 through 12.1.5.1, consider disabling the DATAGRAM::tcp iRules command within a FLOW INIT event as a temporary workaround until a patch is available. For versions 13.1.0 through 13.1.3.3, consider disabling the DATAGRAM::tcp iRules command within a FLOW INIT event as a temporary workaround until a patch is available. For versions 14.1.0 through 14.1.2.3, consider disabling the DATAGRAM::tcp iRules command within a FLOW INIT event as a temporary workaround until a patch is available. For versions 15.0.0 through 15.1.0.1, consider disabling the DATAGRAM::tcp iRules command within a FLOW INIT event as a temporary workaround until a patch is available.

Fix

Related Identifiers

CVE-2020-5877

Affected Products

Big-Ip

References · 4

• https://support.f5.com/csp/article/K54200228 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-5877 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-5877 · Security Note
• https://t.me/cvenotify/3464 · Telegram Post