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CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-20322

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

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Status
Published
Published
Updated
Assigning organization
redhat

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

n/a kernel

Default version status: unaffected

  • 4.15 to < 4.19.215affected
  • 4.20 to < 5.4.146affected
  • 5.5 to < 5.10.65affected
  • 5.11 to < 5.13.17affected
  • 5.14 to < 5.14.4affected

References