CVE-2021-23351

First published: Mon Mar 08 2021(Updated: )

The package github.com/pires/go-proxyproto before 0.5.0 are vulnerable to Denial of Service (DoS) via the parseVersion1() function. The reader in this package is a default bufio.Reader wrapping a net.Conn. It will read from the connection until it finds a newline. Since no limits are implemented in the code, a deliberately malformed V1 header could be used to exhaust memory in a server process using this code - and create a DoS. This can be exploited by sending a stream starting with PROXY and continuing to send data (which does not contain a newline) until the target stops acknowledging. The risk here is small, because only trusted sources should be allowed to send proxy protocol headers.

Credit: report@snyk.io report@snyk.io

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• collector/nvd-cve
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• package-manager/go
• vendor/go-proxyproto project
• canonical/go-proxyproto project go-proxyproto
• vendor/fedoraproject
• canonical/fedoraproject fedora
• version/fedoraproject fedora/33
• version/fedoraproject fedora/34