CVE-2021-23351

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Source
https://cve.org/CVERecord?id=CVE-2021-23351
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23351.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-23351
Aliases
Downstream
Published
2021-03-08T05:15:12.593Z
Modified
2026-07-08T06:49:45.606596500Z
Severity
  • 4.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                },
                {
                    "introduced": "34"
                },
                {
                    "last_affected": "34"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/pires/go-proxyproto

Affected ranges

Type
GIT
Repo
https://github.com/pires/go-proxyproto
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7f48261db810703d173f27f3309a808cc2b49b8b
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.5.0"
        }
    ],
    "cpe": "cpe:2.3:a:go-proxyproto_project:go-proxyproto:*:*:*:*:*:*:*:*"
}

Affected versions

0.*
0.1.0
0.1.1
0.1.2
v0.*
v0.1.3
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.4.0
v0.4.1
v0.4.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23351.json"