CVE-2020-35881: Traitobject Out Of Bounds Write Vulnerability

CRITICAL
Advisory Identifier: GHSA-j79j-cx3h-g27h
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CVSS 9.8
CWE-787
Published
Advisory Summary

CVE-2020-35881 is a CRITICAL (CVSS 9.8) out of bounds write vulnerability (CWE-787: Out-of-bounds Write) affecting Traitobject libraries in the crates.io ecosystem. The issue involves out of bounds write in traitobject. Remediation is available in the latest vendor maintenance releases.

CVE-2020-35881 at a Glance

CVE Identifier CVE-2020-35881
GHSA Identifier GHSA-j79j-cx3h-g27h
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Traitobject
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-2020-35881

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

traitobject fixed: Latest secure release 
Upgrade traitobject 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 traitobject

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35881, inspect your project dependencies for Traitobject:

inspect dependencies for traitobject

Analyze the terminal output to locate any version of Traitobject 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. In Traitobject, 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 traitobject crate through 2020-06-01 for Rust. It has false expectations about fat pointers, possibly causing memory corruption in, for example, Rust 2.x.

CVE-2020-35881 Affected Traitobject Versions

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

References

NVD — CVE-2020-35881 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35881
Traitobject Source Repository REPOSITORY
https://github.com/reem/rust-traitobject/issues/7
Traitobject Source Repository REPOSITORY
https://github.com/reem/rust-traitobject
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0027.html

Frequently Asked Questions

What is CVE-2020-35881?
CVE-2020-35881 is a security vulnerability in Traitobject involving Out of bounds write in traitobject under CWE-787: Out-of-bounds Write.
Which Traitobject versions are affected?
Affected versions include releases prior to current release patches across affected packages: traitobject.
What version fixes CVE-2020-35881?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is traitobject affected?
Yes, traitobject 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-2020-35881?
CVE-2020-35881 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-2020-35881?
CVE-2020-35881 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check crates.io dependencies for CVE-2020-35881?
Run the dependency tree command: 'inspect dependencies for traitobject'. 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-j79j-cx3h-g27h",
  "modified" : "2021-08-19T21:07:57Z",
  "published" : "2021-08-25T20:48:02Z",
  "aliases" : [ "CVE-2020-35881" ],
  "summary" : "Out of bounds write in traitobject",
  "details" : "An issue was discovered in the traitobject crate through 2020-06-01 for Rust. It has false expectations about fat pointers, possibly causing memory corruption in, for example, Rust 2.x.",
  "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" : "traitobject"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35881"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reem/rust-traitobject/issues/7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/reem/rust-traitobject"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0027.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:07:57Z",
    "nvd_published_at" : null
  }
}