Security readout for executives and security teams
Plain-English summary
Racket sandboxed code could trick trusted system modules into using attacker-created modules. For services that run user-submitted Racket, this could let a user influence restricted system functions. The vendor fixed the issue in Racket 8.2.
Executive priority
Treat this as moderate priority unless your organization runs untrusted Racket evaluation. For education, coding platform, or hosted evaluation environments, prioritize remediation because the issue crosses intended sandbox boundaries and affects integrity controls.
Technical view
CVE-2021-32773 is a CWE-441 confused deputy issue in Racket before 8.2. Sandbox evaluation could alter module resolution so system modules used attacker-controlled dependencies, potentially granting access to restricted facilities. CVSS is 6.1 with high integrity impact, changed scope, high attack complexity, and required user interaction.
Likely exposure
Exposure is most likely in systems that evaluate arbitrary or multi-user Racket code, including sandbox-backed education or submission services. Normal Racket deployments without untrusted sandbox evaluation appear less likely exposed based on the supplied sources.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. Exploitation requires a vulnerable Racket version and a context where untrusted code is evaluated through the sandbox.
Researcher notes
Focus review on sandbox module resolution and trusted system module dependency loading. Evidence supports integrity impact, not confidentiality or availability impact. The supplied bundle names Racket before 8.2 as affected and Racket 8.2 as fixed; it does not provide broader product impact evidence.
Mitigation direction
- Upgrade affected Racket installations to version 8.2 or later.
- Review the GitHub advisory for the documented workaround and applicability.
- For arbitrary evaluation services, add external sandboxing such as containers to limit impact.
- For multi-user evaluation systems, prioritize upgrade; the advisory says no workaround is possible.
Validation and detection
- Inventory Racket versions and flag any installation older than 8.2.
- Identify services that evaluate untrusted or user-submitted Racket code.
- Check for sandbox-based workflows, especially multi-user evaluation systems.
- Confirm production and build environments use the fixed Racket release.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-441: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-32773 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N1.64Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937cCVE reference · x_refsource_CONFIRM
- https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unintended Proxy or Intermediary ('Confused Deputy')
Unintended Proxy or Intermediary ('Confused Deputy') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.