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…

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.

Scores

EPSS (exploitation in 30 days)

2.5% · top 15% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• n/a
• CWE-787 (opens in a new tab)All about CWE-787 and its CVEs

Affected products

• n/a

  • affected n/a

References (5)

• https://github.com/envoyproxy/envoy/commits/master (opens in a new tab)x_refsource_MISCx_transferred
• https://groups.google.com/forum/#%21forum/envoy-users (opens in a new tab)x_refsource_MISCx_transferred
• https://blog.envoyproxy.io (opens in a new tab)x_refsource_MISCx_transferred
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-gxvv-x4p2-rppp (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://access.redhat.com/errata/RHSA-2019:4222 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-18801](https://trackcve.app/badge/CVE-2019-18801.svg)](https://trackcve.app/cve/CVE-2019-18801)

Record last updated 5 Aug 2024, 02:02 UTC.