CVE-2023-4696: Github.com/usememos/memos Account TakeOver Due To Improper Vulnerability

CRITICAL
Advisory Identifier: GHSA-j2gj-g3p9-7mrr
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CVSS 9.8
CWE-284
Published
Advisory Summary

CVE-2023-4696 is a CRITICAL (CVSS 9.8) account takeover due to improper vulnerability (CWE-284: Improper Access Control) affecting Github.com/usememos/memos libraries in the Go ecosystem. The issue involves account takeover due to improper handling of jwt tokens in usememos/memos. Remediation is available by upgrading affected packages to version 0.13.2.

CVE-2023-4696 at a Glance

CVE Identifier CVE-2023-4696
GHSA Identifier GHSA-j2gj-g3p9-7mrr
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-284: Improper Access Control
Affected Product Github.com/usememos/memos
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2023-4696

To remediate this vulnerability, upgrade all affected Github.com/usememos/memos 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/usememos/memos fixed: 0.13.2 
Upgrade github.com/usememos/memos to 0.13.2
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/usememos/memos

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-4696, inspect your project dependencies for Github.com/usememos/memos:

inspect dependencies for github.com/usememos/memos

Analyze the terminal output to locate any version of Github.com/usememos/memos in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.13.2), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/usememos/memos, 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

Improper Access Control in GitHub repository usememos/memos prior to 0.13.2. As of commit `c9aa2eeb9` access tokens which fail validation are rejected.

CVE-2023-4696 Affected Github.com/usememos/memos Versions

1 component(s)
Fixed Versions:
0.13.2
Product / Package Ecosystem Affected Versions Fixed Version
github.com/usememos/memos
golang/github.com/usememos/memos
Go
< 0.13.2
0.13.2

References

NVD — CVE-2023-4696 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4696
Security Fix Commit FIX COMMIT
https://github.com/usememos/memos/commit/c9aa2eeb9852047e4f41915eb30726bd25f07ecd
huntr.dev/bounties/4747a485-7... WEB
https://huntr.dev/bounties/4747a485-77c3-4bb5-aab0-21253ef303ca

Frequently Asked Questions

What is CVE-2023-4696?
CVE-2023-4696 is a security vulnerability in Github.com/usememos/memos involving Account TakeOver Due to Improper Handling of JWT Tokens in usememos/memos under CWE-284: Improper Access Control.
Which Github.com/usememos/memos versions are affected?
Affected versions include releases prior to 0.13.2 across affected packages: github.com/usememos/memos.
What version fixes CVE-2023-4696?
Upgrading to 0.13.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/usememos/memos affected?
Yes, github.com/usememos/memos is affected in releases prior to 0.13.2. Upgrade your dependency to 0.13.2 or later.
What is the CVSS score of CVE-2023-4696?
CVE-2023-4696 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-4696?
CVE-2023-4696 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Go dependencies for CVE-2023-4696?
Run the dependency tree command: 'inspect dependencies for github.com/usememos/memos'. 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-j2gj-g3p9-7mrr",
  "modified" : "2023-09-01T21:43:04Z",
  "published" : "2023-09-01T03:30:14Z",
  "aliases" : [ "CVE-2023-4696" ],
  "summary" : "Account TakeOver Due to Improper Handling of JWT Tokens in usememos/memos",
  "details" : "Improper Access Control in GitHub repository usememos/memos prior to 0.13.2. As of commit `c9aa2eeb9` access tokens which fail validation are rejected.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/usememos/memos"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-4696"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/usememos/memos/commit/c9aa2eeb9852047e4f41915eb30726bd25f07ecd"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/4747a485-77c3-4bb5-aab0-21253ef303ca"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-01T21:43:04Z",
    "nvd_published_at" : "2023-09-01T01:15:08Z"
  }
}