CVE-2021-23409: Github.com/pires/go proxyproto Denial of Service Vulnerability
HIGHCVE-2021-23409 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Github.com/pires/go proxyproto libraries in the Go ecosystem. The issue involves github.com/pires/go-proxyproto vulnerable to dos via connection descriptor exhaustion. Remediation is available by upgrading affected packages to version 0.6.1.
CVE-2021-23409 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2021-23409
To remediate this vulnerability, upgrade all affected Github.com/pires/go proxyproto dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/pires/go-proxyproto to 0.6.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/pires/go-proxyprotoHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-23409, inspect your project dependencies for Github.com/pires/go proxyproto:
inspect dependencies for github.com/pires/go-proxyprotoAnalyze the terminal output to locate any version of Github.com/pires/go proxyproto in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.1), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Github.com/pires/go proxyproto, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-23409 Affected Github.com/pires/go proxyproto Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/pires/go-proxyproto
|
Go |
< 0.6.1
|
0.6.1
|
References
Frequently Asked Questions
What is CVE-2021-23409?
Which Github.com/pires/go proxyproto versions are affected?
What version fixes CVE-2021-23409?
Is github.com/pires/go-proxyproto affected?
What is the CVSS score of CVE-2021-23409?
What CWE is associated with CVE-2021-23409?
How can I check Go dependencies for CVE-2021-23409?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-xcf7-q56x-78gh",
"modified" : "2023-08-30T18:51:53Z",
"published" : "2021-07-26T21:23:49Z",
"aliases" : [ "CVE-2021-23409" ],
"summary" : "github.com/pires/go-proxyproto vulnerable to DoS via Connection descriptor exhaustion",
"details" : "The package `github.com/pires/go-proxyproto` before 0.6.1 is vulnerable to Denial of Service (DoS) via creating connections without the proxy protocol header. While this issue was patched in 0.6.0, the fix introduced additional issues which were subsequently patched in 0.6.1.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/pires/go-proxyproto"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.6.1"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23409"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/issues/65"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/issues/75"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/pull/74"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/pull/74/commits/cdc63867da24fc609b727231f682670d0d1cd346"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/pull/76"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/commit/2e44d7a76a851d66890ab341403253afae5caac2"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/pires/go-proxyproto"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/releases/tag/v0.6.0"
}, {
"type" : "WEB",
"url" : "https://github.com/pires/go-proxyproto/releases/tag/v0.6.1"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2022-0233"
}, {
"type" : "WEB",
"url" : "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPIRESGOPROXYPROTO-1316439"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-400" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2021-07-26T17:31:53Z",
"nvd_published_at" : "2021-07-21T07:15:00Z"
}
}