CVE-2020-35877: Ozone Out Of Bounds Read Vulnerability

CRITICAL
Advisory Identifier: GHSA-p2q9-9cq6-h3jw
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CVSS 9.8
CWE-119
Published
Advisory Summary

CVE-2020-35877 is a CRITICAL (CVSS 9.8) out of bounds read vulnerability (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Ozone libraries in the crates.io ecosystem. The issue involves out of bounds read in ozone. Remediation is available in the latest vendor maintenance releases.

CVE-2020-35877 at a Glance

CVE Identifier CVE-2020-35877
GHSA Identifier GHSA-p2q9-9cq6-h3jw
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
Affected Product Ozone
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-2020-35877

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

ozone fixed: Latest secure release 
Upgrade ozone to Latest secure release
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 ozone

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35877, inspect your project dependencies for Ozone:

inspect dependencies for ozone

Analyze the terminal output to locate any version of Ozone in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, where the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. In Ozone, 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

An issue was discovered in the ozone crate through version 0.1.0 for Rust. Memory safety is violated because of out-of-bounds access.

CVE-2020-35877 Affected Ozone Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
ozone
 crates.io
≤ 0.1.0

References

NVD — CVE-2020-35877 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35877
Ozone Source Repository REPOSITORY
https://github.com/bqv/ozone
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0022.html

Frequently Asked Questions

What is CVE-2020-35877?
CVE-2020-35877 is a security vulnerability in Ozone involving Out of bounds read in Ozone under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer.
Which Ozone versions are affected?
Affected versions include releases prior to current release patches across affected packages: ozone.
What version fixes CVE-2020-35877?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is ozone affected?
Yes, ozone is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-35877?
CVE-2020-35877 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-2020-35877?
CVE-2020-35877 is classified under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer (The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.).
How can I check crates.io dependencies for CVE-2020-35877?
Run the dependency tree command: 'inspect dependencies for ozone'. 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-p2q9-9cq6-h3jw",
  "modified" : "2023-06-13T20:11:33Z",
  "published" : "2021-08-25T20:47:46Z",
  "aliases" : [ "CVE-2020-35877" ],
  "summary" : "Out of bounds read in Ozone",
  "details" : "An issue was discovered in the ozone crate through version 0.1.0 for Rust. Memory safety is violated because of out-of-bounds access.",
  "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" : "ozone"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35877"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/bqv/ozone"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0022.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:08:51Z",
    "nvd_published_at" : "2020-12-31T10:15:00Z"
  }
}