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CVE-2024-53271

Envoyproxy Envoy vulnerability

7.1 HIGHPublic exploitEPSS 0.62%
  1. Published18 Dec 2024

Description

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS 3.1 breakdown

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

Affected products

Envoyproxy Envoy≥ 1.31.0 < 1.31.5 · ≥ 1.32.0 ≤ 1.32.3

Remediation

Fixed in
Envoyproxy Envoy≥ 1.31.5

References

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Frequently asked

Is CVE-2024-53271 being actively exploited?

CVE-2024-53271 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.62%.

How severe is CVE-2024-53271?

CVE-2024-53271 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.62% probability of exploitation.

Which products are affected by CVE-2024-53271?

Affected products include Envoyproxy Envoy.

How do I fix CVE-2024-53271?

Upgrade affected software to a fixed version, for example Envoyproxy Envoy 1.31.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-53271 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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