medium
5.3
CWE
770
Advisory Published
Advisory Published
Updated

CVE-2022-41717: Excessive memory growth in net/http and golang.org/x/net/http2

First published: Thu Dec 08 2022(Updated: )

An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large keys can cause the server to allocate approximately 64 MiB per open connection.

Credit: security@golang.org security@golang.org security@golang.org

Affected SoftwareAffected VersionHow to fix
go/golang.org/x/net/http2<0.4.0
0.4.0
redhat/golang<1.19.4
1.19.4
redhat/golang<1.18.9
1.18.9
Golang Go<1.18.9
Golang Go>=1.19.0<1.19.4
Golang Http2 Go<0.4.0
Fedoraproject Fedora=37
Fedoraproject Fedora=38

Remedy

https://go.dev/cl/455635

Remedy

https://go.dev/cl/455717

Remedy

https://go.dev/issue/56350

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2022-41717?

    The severity of CVE-2022-41717 is medium with a severity value of 5.3.

  • How does CVE-2022-41717 affect Go server?

    CVE-2022-41717 can cause excessive memory growth in a Go server accepting HTTP/2 requests.

  • What can an attacker do with CVE-2022-41717?

    An attacker exploiting CVE-2022-41717 can cause the server to allocate excessive memory by sending very large keys.

  • Which versions of Golang are affected by CVE-2022-41717?

    Versions up to and exclusive of 1.18.9 and versions between inclusive and exclusive of 1.19.0 to 1.19.4 are affected by CVE-2022-41717.

  • How can I fix CVE-2022-41717?

    To fix CVE-2022-41717, update to Golang version 1.18.9 or 1.19.4, depending on your current version.

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