High severity · published Dec 18, 2024
CVE-2024-53271
HTTP/1.1 multiple issues with envoy.reloadable_features.http1_balsa_delay_reset in envoy
7.1
CVSS
0.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
envoy · envoyproxy
>= 1.31.0, < 1.31.5; >= 1.32.0, < 1.32.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-53271
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-53271
Patch
https://github.com/envoyproxy/envoy/commit/da56f6da63079baecef9183436ee5f4141a59af8
Exploit
https://github.com/envoyproxy/envoy/security/advisories/GHSA-rmm5-h2wv-mg4f
More from envoy
9.8
CVE-2026-111497
Out-of-Bounds Write in Google Brotli Decoder
7.5
CVE-2023-44487
HTTP/2 Rapid Reset Attack Vulnerability
10.0
CVE-2019-9901
Envoy 1.9.0 and before does not normalize HTTP URL paths
9.8
CVE-2023-35941
Envoy is an open source edge and service proxy designed for cloud-native applications
9.8
CVE-2023-27488
Envoy is an open source edge and service proxy designed for cloud-native applications