CVE-2021-46102: Solana rbpf Integer Overflow Vulnerability

HIGH
Advisory Identifier: GHSA-xwqr-xmgg-j69q
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CVSS 7.5
CWE-190
Published
Advisory Summary

CVE-2021-46102 is a HIGH (CVSS 7.5) integer overflow vulnerability (CWE-190: Integer Overflow or Wraparound) affecting Solana rbpf libraries in the crates.io ecosystem. The issue involves integer overflow in solana_rbpf. Remediation is available by upgrading affected packages to version 0.2.17.

CVE-2021-46102 at a Glance

CVE Identifier CVE-2021-46102
GHSA Identifier GHSA-xwqr-xmgg-j69q
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-190: Integer Overflow or Wraparound
Affected Product Solana rbpf
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-46102

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

solana_rbpf fixed: 0.2.17 
Upgrade solana_rbpf to 0.2.17
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 solana_rbpf

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-46102, inspect your project dependencies for Solana rbpf:

inspect dependencies for solana_rbpf

Analyze the terminal output to locate any version of Solana rbpf in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.17), 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-190: Integer Overflow or Wraparound, where the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number. In Solana rbpf, 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

From version 0.2.14 to 0.2.16 for Solana rBPF, function "relocate" in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable "addr" via `addr = (sym.st_value + refd_pa) as u64`

CVE-2021-46102 Affected Solana rbpf Versions

1 component(s)
Fixed Versions:
0.2.17
Product / Package Ecosystem Affected Versions Fixed Version
solana_rbpf
 crates.io
≥ 0.2.14
< 0.2.17
0.2.17

References

NVD — CVE-2021-46102 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-46102
Solana rbpf Source Repository REPOSITORY
https://github.com/solana-labs/rbpf/pull/200
Solana rbpf Source Repository REPOSITORY
https://github.com/solana-labs/rbpf/pull/236
blocksecteam.medium.com/new-integer-overflo... WEB
https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159ee
Solana rbpf Source Repository REPOSITORY
https://github.com/solana-labs/rbpf
Solana rbpf Source Repository REPOSITORY
https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630
Solana rbpf Release RELEASE
https://github.com/solana-labs/rbpf/releases/tag/v0.2.17

Frequently Asked Questions

What is CVE-2021-46102?
CVE-2021-46102 is a security vulnerability in Solana rbpf involving Integer overflow in solana_rbpf under CWE-190: Integer Overflow or Wraparound.
Which Solana rbpf versions are affected?
Affected versions include releases prior to 0.2.17 across affected packages: solana_rbpf.
What version fixes CVE-2021-46102?
Upgrading to 0.2.17 (or the latest patched release for your respective branch) resolves the vulnerability.
Is solana_rbpf affected?
Yes, solana_rbpf is affected in releases prior to 0.2.17. Upgrade your dependency to 0.2.17 or later.
What is the CVSS score of CVE-2021-46102?
CVE-2021-46102 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2021-46102?
CVE-2021-46102 is classified under CWE-190: Integer Overflow or Wraparound (The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.).
How can I check crates.io dependencies for CVE-2021-46102?
Run the dependency tree command: 'inspect dependencies for solana_rbpf'. 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-xwqr-xmgg-j69q",
  "modified" : "2023-04-26T22:14:09Z",
  "published" : "2022-01-28T22:59:28Z",
  "aliases" : [ "CVE-2021-46102" ],
  "summary" : "Integer overflow in solana_rbpf",
  "details" : "From version 0.2.14 to 0.2.16 for Solana rBPF, function \"relocate\" in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable \"addr\" via `addr = (sym.st_value + refd_pa) as u64`",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "solana_rbpf"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.2.14"
      }, {
        "fixed" : "0.2.17"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-46102"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/solana-labs/rbpf/pull/200"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/solana-labs/rbpf/pull/236"
  }, {
    "type" : "WEB",
    "url" : "https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159ee"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/solana-labs/rbpf"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/solana-labs/rbpf/releases/tag/v0.2.17"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-190" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-28T19:06:48Z",
    "nvd_published_at" : "2022-01-27T18:15:00Z"
  }
}