Security readout for executives and security teams
Plain-English summary
CVE-2021-3588 is a low-severity BlueZ information disclosure flaw. A local low-privileged user could cause BlueZ to read past intended bounds and disclose limited memory contents. The supplied sources do not identify affected versions, active exploitation, or a specific fixed release.
Executive priority
Treat as routine patch management unless BlueZ runs on shared Linux endpoints, kiosks, lab devices, or systems with many local users. Business urgency is low because impact is limited to confidentiality and requires local low-privileged access.
Technical view
In BlueZ, cli_feat_read_cb() in src/gatt-database.c fails to bounds-check the offset before indexing an array for a read operation. The CVSS 3.1 vector is local, low complexity, low privileges, no user interaction, with low confidentiality impact only.
Likely exposure
Exposure is most likely on systems running affected BlueZ builds where local users or local processes can reach the relevant GATT database code path. The source bundle lists BlueZ versions as unspecified, so exact product scoping requires vendor or distro advisory review.
Exploitation context
The bundle marks this CVE as not in CISA KEV and provides no cited evidence of active exploitation. The CVSS vector indicates local access and low privileges are required; it does not support a remote unauthenticated attack claim.
Researcher notes
The main evidence gap is version specificity. Sources identify the vulnerable function and bounds-check issue, but the bundle does not provide affected or fixed version ranges. Avoid assuming Bluetooth-range remote exploitability because the CVSS attack vector is local.
Mitigation direction
- Inventory systems running BlueZ.
- Check BlueZ package status against vendor or distribution guidance.
- Apply vendor-supported BlueZ security updates when available.
- Limit local shell access to trusted users.
- Review Gentoo GLSA-202209-16 if using Gentoo packages.
Validation and detection
- Confirm whether BlueZ is installed on each in-scope system.
- Record installed BlueZ versions and package source.
- Compare versions against applicable vendor advisories.
- Verify security updates have been applied successfully.
- Document systems where affected-version status remains unknown.
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-125: 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 lookupCWE-788: 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-3588 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
- Low
- CVSS
- 3.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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.
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:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/bluez/bluez/issues/70CVE reference · x_refsource_MISC
- GLSA-202209-16CVE reference · vendor-advisory, x_refsource_GENTOO
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Access of Memory Location After End of Buffer
Access of Memory Location After End of Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.