CVE-2019-18801 — Out-of-bounds Write in Envoy

CWE-787 — Out-of-bounds WriteCWE-131 — Incorrect Calculation of Buffer Size4 documents4 sources
Severity
9.8CRITICALNVD
EPSS
0.0%
top 86.56%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Envoyproxy Envoy
Timeline
PublishedDec 13
Latest updateMay 24

Description

An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

▶NVDenvoyproxy/envoy1.12.1

Patches

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

🔴Vulnerability Details

1
GHSA
GHSA-288h-hv2q-fwrv: An issue was discovered in Envoy 1↗2022-05-24
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📋Vendor Advisories

1
Red Hat
envoy: an untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1↗2019-12-10
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💬Community

1
Bugzilla
CVE-2019-18801 envoy: an untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1↗2019-11-18
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CVE-2019-18801 — Out-of-bounds Write in Envoy | cvebase