CVE-2021-45328: Github.com/go gitea/gitea Open Redirect Vulnerability

MODERATE
Advisory Identifier: GHSA-36h2-95gj-w488
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CVSS 6.1
CWE-601
Published
Advisory Summary

CVE-2021-45328 is a MODERATE (CVSS 6.1) open redirect vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Github.com/go gitea/gitea libraries in the Go ecosystem. The issue involves open redirect in gitea. Remediation is available by upgrading affected packages to version 1.4.3.

CVE-2021-45328 at a Glance

CVE Identifier CVE-2021-45328
GHSA Identifier GHSA-36h2-95gj-w488
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Affected Product Github.com/go gitea/gitea
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-45328

To remediate this vulnerability, upgrade all affected Github.com/go gitea/gitea dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/go-gitea/gitea fixed: 1.4.3 
Upgrade github.com/go-gitea/gitea to 1.4.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/go-gitea/gitea

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45328, inspect your project dependencies for Github.com/go gitea/gitea:

inspect dependencies for github.com/go-gitea/gitea

Analyze the terminal output to locate any version of Github.com/go gitea/gitea in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.3), 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-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Github.com/go gitea/gitea, 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

Gitea before 1.4.3 is affected by URL Redirection to Untrusted Site ('Open Redirect') via internal URLs.

CVE-2021-45328 Affected Github.com/go gitea/gitea Versions

1 component(s)
Fixed Versions:
1.4.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/go-gitea/gitea
golang/github.com/go-gitea/gitea
Go
< 1.4.3
1.4.3

References

NVD — CVE-2021-45328 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45328
Github.com/go gitea/gitea Source Repository REPOSITORY
https://github.com/go-gitea/gitea/issues/4332
blog.gitea.io/2018/06/release-of-... WEB
https://blog.gitea.io/2018/06/release-of-1.4.3
Github.com/go gitea/gitea Source Repository REPOSITORY
https://github.com/go-gitea/gitea

Frequently Asked Questions

What is CVE-2021-45328?
CVE-2021-45328 is a security vulnerability in Github.com/go gitea/gitea involving Open redirect in Gitea under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').
Which Github.com/go gitea/gitea versions are affected?
Affected versions include releases prior to 1.4.3 across affected packages: github.com/go-gitea/gitea.
What version fixes CVE-2021-45328?
Upgrading to 1.4.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/go-gitea/gitea affected?
Yes, github.com/go-gitea/gitea is affected in releases prior to 1.4.3. Upgrade your dependency to 1.4.3 or later.
What is the CVSS score of CVE-2021-45328?
CVE-2021-45328 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2021-45328?
CVE-2021-45328 is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect') (The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.).
How can I check Go dependencies for CVE-2021-45328?
Run the dependency tree command: 'inspect dependencies for github.com/go-gitea/gitea'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-36h2-95gj-w488",
  "modified" : "2022-02-14T23:00:49Z",
  "published" : "2022-02-09T00:00:28Z",
  "aliases" : [ "CVE-2021-45328" ],
  "summary" : "Open redirect in Gitea",
  "details" : "Gitea before 1.4.3 is affected by URL Redirection to Untrusted Site ('Open Redirect') via internal URLs.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/go-gitea/gitea"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45328"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/go-gitea/gitea/issues/4332"
  }, {
    "type" : "WEB",
    "url" : "https://blog.gitea.io/2018/06/release-of-1.4.3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/go-gitea/gitea"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-02-14T23:00:49Z",
    "nvd_published_at" : "2022-02-08T16:15:00Z"
  }
}