CVE-2019-15226
First published: Wed Oct 09 2019(Updated: )
Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Envoy Proxy | =1.0.0 | |
| Envoy Proxy | =1.1.0 | |
| Envoy Proxy | =1.2.0 | |
| Envoy Proxy | =1.3.0 | |
| Envoy Proxy | =1.4.0 | |
| Envoy Proxy | =1.5.0 | |
| Envoy Proxy | =1.6.0 | |
| Envoy Proxy | =1.7.0 | |
| Envoy Proxy | =1.7.1 | |
| Envoy Proxy | =1.8.0 | |
| Envoy Proxy | =1.9.0 | |
| Envoy Proxy | =1.9.1 | |
| Envoy Proxy | =1.10.0 | |
| Envoy Proxy | =1.11.0 | |
| Envoy Proxy | =1.11.1 | |
| Envoy Proxy | =1.11.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2019-15226?
CVE-2019-15226 has been assigned a severity rating of medium due to its potential impact on service availability.
How do I fix CVE-2019-15226?
To fix CVE-2019-15226, upgrade to a version of Envoy Proxy that is 1.11.2 or later.
Which versions of Envoy Proxy are affected by CVE-2019-15226?
CVE-2019-15226 affects Envoy Proxy versions from 1.10.0 up to, but not including, 1.11.2.
What types of traffic are impacted by CVE-2019-15226?
CVE-2019-15226 impacts both HTTP/1.x and HTTP/2 traffic.
Is CVE-2019-15226 a DoS vulnerability?
Yes, CVE-2019-15226 can be exploited to cause a Denial of Service (DoS) condition.
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/references
- agent/remedy
- agent/severity
- agent/last-modified-date
- agent/weakness
- agent/description
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/envoyproxy
- canonical/envoy proxy
- version/envoy proxy/1.0.0
- version/envoy proxy/1.1.0
- version/envoy proxy/1.2.0
- version/envoy proxy/1.3.0
- version/envoy proxy/1.4.0
- version/envoy proxy/1.5.0
- version/envoy proxy/1.6.0
- version/envoy proxy/1.7.0
- version/envoy proxy/1.7.1
- version/envoy proxy/1.8.0
- version/envoy proxy/1.9.0
- version/envoy proxy/1.9.1
- version/envoy proxy/1.10.0
- version/envoy proxy/1.11.0
- version/envoy proxy/1.11.1
- version/envoy proxy/1.11.2