CVE-2021-23351 – github.com/pires/go-proxyproto

Package

Manager: go
Name: github.com/pires/go-proxyproto
Vulnerable Version: >=0 <0.5.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.01345 pctl0.79304

Details

github.com/pires/go-proxyproto denial of service vulnerability 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.

Metadata

Created: 2021-05-18T21:07:43Z
Modified: 2023-09-14T19:22:34Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-fqh4-rh59-xhvf/GHSA-fqh4-rh59-xhvf.json
CWE IDs: ["CWE-400"]
Alternative ID: GHSA-fqh4-rh59-xhvf
Finding: F002
Auto approve: 1