flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was…
Summary
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.
- kernel 4.15 before 4.19.215
- kernel 4.20 before 5.4.146
- kernel 5.5 before 5.10.65
- kernel 5.11 before 5.13.17
- kernel 5.14 before 5.14.4
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
- 4.19.215
- 5.4.146
- 5.10.65
- 5.13.17
- 5.14.4
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 4.19.215, 5.4.146, 5.10.65, 5.13.17, 5.14.4. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
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