Improper Restriction of Operations within the Bounds of a Memory Buffer Affecting envoyproxy/envoy package, versions [,1.28.7)[1.29.0,1.29.9)[1.30.0,1.30.6)[1.31.0,1.31.2)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-ENVOYPROXYENVOY-8062345
- published20 Sept 2024
- disclosed20 Sept 2024
- creditNick Van Dyck
Introduced: 20 Sep 2024
CVE-2024-45810 (opens in a new tab)How to fix?
Upgrade envoyproxy/envoy to version 1.28.7, 1.29.9, 1.30.6, 1.31.2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Restriction of Operations within the Bounds of a Memory Buffer due to the handling of sendLocalReply in the HTTP async client. An attacker can cause the application to crash by exploiting the improper handling of HTTP status codes and the destruction sequence of the async stream.
Note:
This is only exploitable if the upgrade and connection headers are allowed, and request mirroring is configured.
PoC
- config
allowed_headersto match any headers or
patterns:
- exact: upgrade
- exact: connection
Send WebSocket upgrade requests
The authentication server sends back 400 to reject the auth request.
Then Envoy will crash