CVE-2019-18801 Memory corruption in n/a
Untrusted HTTP/2 requests can corrupt heap memory in Envoy, potentially leading to code execution or bypassing access controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-18801?
CVE-2019-18801 is a critical memory corruption vulnerability in Envoyproxy Envoy, published on 13 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2019-18801?
It affects 1 product.
Products include Envoyproxy Envoy.
How do I fix CVE-2019-18801?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-18801 being exploited?
There is no known exploitation of CVE-2019-18801 in the wild and no public exploit code.
Other vulnerabilities in Envoyproxy Envoy
- CVE-2022-29226 Trivial authentication bypass in Envoy
- CVE-2019-18802 Security feature bypass in n/a
- CVE-2020-35470 Information disclosure in n/a
- CVE-2024-23324 Envoy ext auth can be bypassed when Proxy protocol filter sets invalid UTF-8 metadata
- CVE-2023-35941 Envoy vulnerable to OAuth2 credentials exploit with permanent validity
Sources
Also known as GHSA-288h-hv2q-fwrv, GHSA-gxvv-x4p2-rppp.