CVE-2024-30255 — Detection of Error Condition Without Action in Envoy

CWE-390 — Detection of Error Condition Without Action3 documents3 sources
Severity
7.5HIGHNVD
EPSS
88.8%
top 0.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Envoyproxy Envoy
Timeline
PublishedApr 4

Description

Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximat…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDenvoyproxy/envoy1.27.0 — 1.27.4+3
▶CVEListV5envoyproxy/envoy>= 1.27.0, < 1.27.4, >= 1.28.0, < 1.28.2, >= 1.29.0, < 1.29.3+2

Patches

Patch: github.com ↗Patch: github.com ↗

📋Vendor Advisories

1
Red Hat
envoy: HTTP/2 CPU exhaustion due to CONTINUATION frame flood↗2024-04-03
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🕵️Threat Intelligence

1
Bleepingcomputer
New HTTP/2 DoS attack can crash web servers with a single connection↗2024-04-04
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