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CVE-2024-53270

Envoyproxy Envoy NULL pointer dereference

7.5 HIGHPublic exploitEPSS 0.70%
  1. Published18 Dec 2024

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions `sendOverloadError` is going to assume the active request exists when `envoy.load_shed_points.http1_server_abort_dispatch` is configured. If `active_request` is nullptr, only onMessageBeginImpl() is called. However, the `onMessageBeginImpl` will directly return ok status if the stream is already reset leading to the nullptr reference. The downstream reset can actually happen during the H/2 upstream reset. As a result envoy may crash. This issue has been addressed in releases 1.32.3, 1.31.5, 1.30.9, and 1.29.12. Users are advised to upgrade. Users unable to upgrade may disable `http1_server_abort_dispatch` load shed point and/or use a high threshold.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Envoyproxy Envoy≥ 1.30.0 < 1.30.9 · ≥ 1.31.0 < 1.31.5 · ≥ 1.32.0 < 1.32.3 · < 1.29.12

Remediation

Fixed in
Envoyproxy Envoy≥ 1.30.9

References

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Frequently asked

Is CVE-2024-53270 being actively exploited?

CVE-2024-53270 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.70%.

How severe is CVE-2024-53270?

CVE-2024-53270 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.70% probability of exploitation.

Which products are affected by CVE-2024-53270?

Affected products include Envoyproxy Envoy.

How do I fix CVE-2024-53270?

Upgrade affected software to a fixed version, for example Envoyproxy Envoy 1.30.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.