CVE-2020-25705

CVE Details

Release Date:	2020-11-17
Impact:	None	What is this?

Description

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. Kernel versions before 5.10 may be vulnerable to this issue.

See more information about CVE-2020-25705 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.4
Vector String:	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2021-9002	2021-01-07
Oracle Linux version 7 (kernel)	ELSA-2021-0856	2021-03-17
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9002	2021-01-07
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9006	2021-01-12
Oracle Linux version 7 (kernel-uek-container)	ELSA-2021-9007	2021-01-12
Oracle Linux version 8 (kernel)	ELSA-2021-0558	2021-02-17
Oracle Linux version 8 (kernel-uek)	ELSA-2021-9006	2021-01-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2021-9007	2021-01-12
Oracle VM version 3.4 (kernel-uek)	OVMSA-2021-0001	2021-01-07