Security readout for executives and security teams
Plain-English summary
CVE-2021-44283 describes a buffer overflow in ShieldStore's Enclave.cpp that can leak sensitive information when an attacker supplies a crafted structure from an untrusted operating system. The public record rates confidentiality impact as high, but the source bundle does not identify formal affected product versions or a confirmed fix.
Executive priority
Handle as a targeted high-priority review if ShieldStore is present. The business risk is sensitive data leakage, not service outage or data modification. If ShieldStore is not used, priority is low after documented inventory confirmation.
Technical view
The issue is classified as CWE-120 in Electronics and Telecommunications Research Institute ShieldStore commit 58d455617f99705f0ffd8a27616abdf77bdc1bdc. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, unchanged scope, high confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is most likely in organizations running, evaluating, or forking the referenced ShieldStore code, especially where the enclave boundary processes structures supplied by an untrusted OS. The bundle lists affected vendor, product, versions, and CPEs as n/a, so exposure cannot be generalized beyond ShieldStore evidence.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. It cites a public GitHub source file and issue, so technical details may be publicly visible. Treat exploitation status as unconfirmed unless later vendor, KEV, or incident sources say otherwise.
Researcher notes
Key gaps are affected version range, CPEs, fixed commit, and maintainer remediation. The CVSS vector supports confidentiality-focused impact only. Avoid expanding claims to unrelated ETRI products or SGX enclave software without separate evidence.
Mitigation direction
- Inventory ShieldStore deployments, forks, and dependencies for the referenced commit.
- Review the GitHub issue and maintainer guidance for any fixed commit or workaround.
- Restrict access to systems running affected ShieldStore code where operationally feasible.
- Prioritize rebuilding from a maintained version once a fix is confirmed.
- Monitor related systems for unexplained sensitive data exposure.
Validation and detection
- Check SBOMs and source repositories for ShieldStore usage.
- Compare local Enclave.cpp lineage against commit 58d455617f99705f0ffd8a27616abdf77bdc1bdc.
- Confirm whether untrusted OS-controlled structures reach the affected enclave code path.
- Record that KEV-based active exploitation evidence is absent in the provided bundle.
- Track CVE and GitHub references for corrected affected-version and fix details.
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-120: 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-2021-44283 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.
SSVC decision data
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:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/cocoppang/ShieldStore/blob/master/Enclave/Enclave.cppCVE reference, mitre
- https://github.com/cocoppang/ShieldStore/issues/19CVE reference, mitre
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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.