Alpaquita LinuxStreamSecurity Advisory
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CVE-2021-20322

Published: February 18, 2022Last modified: November 10, 2023

Description

A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the 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.

Severity score breakdown

ParameterValue
Base score7.4
Attack VectorNETWORK
Attack complexityHIGH
Privileges requiredNONE
User interactionNONE
ScopeUNCHANGED
ConfidentialityHIGH
Integrity impactHIGH
Availability impactNONE
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Status

ProductReleasePackageStatus
Alpaquita LinuxStreamlinux-ltsUnknown (6.1.33-r0)

References

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