CVE-2021-28027: Bam Loading A Bgzip Block Can Vulnerability

CRITICAL
Advisory Identifier: GHSA-cpqj-r29q-chrh
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CVSS 9.8
CWE-191
Published
Advisory Summary

CVE-2021-28027 is a CRITICAL (CVSS 9.8) loading a bgzip block can vulnerability (CWE-191: Integer Underflow (Wrap or Wraparound)) affecting Bam libraries in the crates.io ecosystem. The issue involves loading a bgzip block can write out of bounds if size overflows.. Remediation is available by upgrading affected packages to version 0.1.3.

CVE-2021-28027 at a Glance

CVE Identifier CVE-2021-28027
GHSA Identifier GHSA-cpqj-r29q-chrh
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-191: Integer Underflow (Wrap or Wraparound)
Affected Product Bam
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-2021-28027

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

bam fixed: 0.1.3 
Upgrade bam to 0.1.3
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 bam

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-28027, inspect your project dependencies for Bam:

inspect dependencies for bam

Analyze the terminal output to locate any version of Bam in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.3), 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-191: Integer Underflow (Wrap or Wraparound), where the product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. In Bam, 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 bam crate before 0.1.3 for Rust. There is an integer underflow and out-of-bounds write during the loading of a bgzip block.

CVE-2021-28027 Affected Bam Versions

1 component(s)
Fixed Versions:
0.1.3
Product / Package Ecosystem Affected Versions Fixed Version
bam
 crates.io
< 0.1.3
0.1.3

References

NVD — CVE-2021-28027 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28027
gitlab.com/tprodanov/bam PACKAGE
https://gitlab.com/tprodanov/bam
gitlab.com/tprodanov/bam/-/iss... WEB
https://gitlab.com/tprodanov/bam/-/issues/4
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0027.html

Frequently Asked Questions

What is CVE-2021-28027?
CVE-2021-28027 is a security vulnerability in Bam involving Loading a bgzip block can write out of bounds if size overflows. under CWE-191: Integer Underflow (Wrap or Wraparound).
Which Bam versions are affected?
Affected versions include releases prior to 0.1.3 across affected packages: bam.
What version fixes CVE-2021-28027?
Upgrading to 0.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is bam affected?
Yes, bam is affected in releases prior to 0.1.3. Upgrade your dependency to 0.1.3 or later.
What is the CVSS score of CVE-2021-28027?
CVE-2021-28027 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-2021-28027?
CVE-2021-28027 is classified under CWE-191: Integer Underflow (Wrap or Wraparound) (The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.).
How can I check crates.io dependencies for CVE-2021-28027?
Run the dependency tree command: 'inspect dependencies for bam'. 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-cpqj-r29q-chrh",
  "modified" : "2022-06-16T23:23:31Z",
  "published" : "2022-05-24T17:43:47Z",
  "aliases" : [ "CVE-2021-28027" ],
  "summary" : "Loading a bgzip block can write out of bounds if size overflows.",
  "details" : "An issue was discovered in the bam crate before 0.1.3 for Rust. There is an integer underflow and out-of-bounds write during the loading of a bgzip block.",
  "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" : "bam"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-28027"
  }, {
    "type" : "PACKAGE",
    "url" : "https://gitlab.com/tprodanov/bam"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.com/tprodanov/bam/-/issues/4"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0027.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-191" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-16T23:23:31Z",
    "nvd_published_at" : "2021-03-05T09:15:00Z"
  }
}