CVE-2024-53271 HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy

What is CVE-2024-53271?

CVE-2024-53271 is a high-severity vulnerability in Envoyproxy Envoy, published on 18 Dec 2024.

Official 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.

Weakness: CWE-670

Which versions are affected by CVE-2024-53271?

1 open source package ship an affected version, including envoy. It affects 1 product.

Products include Envoyproxy Envoy.

How do I fix CVE-2024-53271?

Upgrade envoy to a fixed version for your release line: 1.31.5 or 1.32.3.

Is CVE-2024-53271 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-53271 exists.

Other vulnerabilities in Envoyproxy Envoy

• CVE-2022-29226 Trivial authentication bypass in Envoy Critical 10.0
• CVE-2019-18801 Memory corruption in n/a Critical 9.8
• CVE-2019-18802 Security feature bypass in n/a Critical 9.8
• CVE-2020-35470 Information disclosure in n/a High 8.8
• CVE-2024-23324 Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata High 8.6

All Envoyproxy Envoy vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-envoy-2024-53271, GHSA-rmm5-h2wv-mg4f.