Envoy crashes when idle and request per try timeout occur within the backoff interval

Moderate

phlax published GHSA-6p83-mfmh-qv38

Feb 9, 2024

Package

Envoy Proxy (Envoy)

Affected versions

<1.29.1

Patched versions

1.29.1, 1.28.1, 1.27.3, 1.26.7

Description

Summary

Envoy will crash when certain timeouts happen within the same interval

Details

The crash occurs when the following are true:

hedge_on_per_try_timeout is enabled
per_try_idle_timeout is enabled (it can only be done in configuration)
per-try-timeout is enabled, either through headers or configuration and its value is equal, or within the backoff interval of the per_try_idle_timeout.

Impact

Denial of Service

Credits

Severity

Moderate

5.9

/ 10

CVSS base metrics

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H