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Amazon Linux AMI 2: CVE-2024-30255: Security patch for ecs-service-connect-agent (ALASECS-2024-038)

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Amazon Linux AMI 2: CVE-2024-30255: Security patch for ecs-service-connect-agent (ALASECS-2024-038)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
04/04/2024
Created
08/03/2024
Added
08/02/2024
Modified
08/02/2024

Description

Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections.

Solution(s)

  • amazon-linux-ami-2-upgrade-ecs-service-connect-agent

References

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