CVE-2021-45684: Flumedb Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-p46c-w9m3-7qr2
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CVSS 9.8
CWE-908
Published
Advisory Summary

CVE-2021-45684 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-908: Use of Uninitialized Resource) affecting Flumedb libraries in the crates.io ecosystem. The issue involves use of uninitialized resource in flumedb.. Remediation is available by upgrading affected packages to version 0.1.6.

CVE-2021-45684 at a Glance

CVE Identifier CVE-2021-45684
GHSA Identifier GHSA-p46c-w9m3-7qr2
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-908: Use of Uninitialized Resource
Affected Product Flumedb
Package Ecosystem crates.io
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:3.1/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-2021-45684

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

flumedb fixed: 0.1.6 
Upgrade flumedb to 0.1.6
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 flumedb

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45684, inspect your project dependencies for Flumedb:

inspect dependencies for flumedb

Analyze the terminal output to locate any version of Flumedb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.6), 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-908: Use of Uninitialized Resource, where the product uses or accesses a resource that has not been initialized. In Flumedb, 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

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation. There are two of such cases (go_offset_log::read_entry() & offset_log::read_entry()). Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

CVE-2021-45684 Affected Flumedb Versions

1 component(s)
Fixed Versions:
0.1.6
Product / Package Ecosystem Affected Versions Fixed Version
flumedb
 crates.io
< 0.1.6
0.1.6

References

NVD — CVE-2021-45684 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45684
Flumedb Source Repository REPOSITORY
https://github.com/sunrise-choir/flumedb-rs/issues/10
Flumedb Source Repository REPOSITORY
https://github.com/sunrise-choir/flumedb-rs/pull/12
Security Fix Commit FIX COMMIT
https://github.com/sunrise-choir/flumedb-rs/commit/14b7440271c9d2316fab52c745e21087559364f6
Flumedb Source Repository REPOSITORY
https://github.com/sunrise-choir/flumedb-rs
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/flumedb/RUSTSEC-2021-0086.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0086.html

Frequently Asked Questions

What is CVE-2021-45684?
CVE-2021-45684 is a security vulnerability in Flumedb involving Use of Uninitialized Resource in flumedb. under CWE-908: Use of Uninitialized Resource.
Which Flumedb versions are affected?
Affected versions include releases prior to 0.1.6 across affected packages: flumedb.
What version fixes CVE-2021-45684?
Upgrading to 0.1.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is flumedb affected?
Yes, flumedb is affected in releases prior to 0.1.6. Upgrade your dependency to 0.1.6 or later.
What is the CVSS score of CVE-2021-45684?
CVE-2021-45684 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-45684?
CVE-2021-45684 is classified under CWE-908: Use of Uninitialized Resource (The product uses or accesses a resource that has not been initialized.).
How can I check crates.io dependencies for CVE-2021-45684?
Run the dependency tree command: 'inspect dependencies for flumedb'. 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-p46c-w9m3-7qr2",
  "modified" : "2023-06-13T18:08:03Z",
  "published" : "2022-01-06T22:18:35Z",
  "aliases" : [ "CVE-2021-45684" ],
  "summary" : "Use of Uninitialized Resource in flumedb.",
  "details" : "Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation. There are two of such cases (go_offset_log::read_entry() & offset_log::read_entry()).\n\nArbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "flumedb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45684"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sunrise-choir/flumedb-rs/issues/10"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sunrise-choir/flumedb-rs/pull/12"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sunrise-choir/flumedb-rs/commit/14b7440271c9d2316fab52c745e21087559364f6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sunrise-choir/flumedb-rs"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/flumedb/RUSTSEC-2021-0086.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0086.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-908" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-06T18:10:24Z",
    "nvd_published_at" : "2021-12-27T00:15:00Z"
  }
}