Security readout for executives and security teams
Plain-English summary
CVE-2023-51939 is a high-severity issue reported in Relic relic-toolkit 0.6.0, in the cp_bbs_sig signing function. The public record says a remote attacker may obtain sensitive information and escalate privileges, but affected-product metadata and remediation details are sparse.
Executive priority
Prioritize investigation if cryptographic services, identity systems, or signing workflows depend on Relic 0.6.0. If Relic is not present or BBS signatures are unused, urgency is lower but should still be documented.
Technical view
The CVE describes an issue in relic/src/cp/relic_cp_bbs.c, function cp_bbs_sig, associated with CWE-74. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to systems that compile or embed Relic relic-toolkit 0.6.0 and use the affected BBS signature functionality. The CVE record does not provide CPEs, downstream package names, or deployment-specific indicators.
Exploitation context
The source bundle includes public GitHub research references and a Relic issue, but KEV is false and no cited source confirms active exploitation. Treat this as a credible public vulnerability, not evidence of ongoing mass exploitation.
Researcher notes
The public record is thin: affected vendor/product fields are n/a despite the description naming Relic relic-toolkit 0.6.0. No patch, fixed version, or active exploitation evidence is provided in the supplied bundle.
Mitigation direction
- Inventory software using Relic relic-toolkit 0.6.0.
- Check the Relic issue and vendor guidance for patches or recommended changes.
- Prioritize systems exposing BBS signature operations to untrusted users or workflows.
- Reduce untrusted access to affected signing paths until remediation is confirmed.
- Review sensitive key material handling if exposure is suspected.
Validation and detection
- Confirm whether Relic relic-toolkit 0.6.0 is present in builds or dependencies.
- Determine whether cp_bbs_sig or BBS signature functionality is used.
- Map whether remote or untrusted input can reach the affected function.
- Review vendor issue status before declaring remediation complete.
- Document uncertainty where product metadata or fixed versions are unavailable.
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-74: 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-2023-51939 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/liang-junkai/Relic-bbs-fault-injectionCVE reference
- https://github.com/relic-toolkit/relic/issues/284CVE reference
- https://gist.github.com/liang-junkai/1b59487c0f7002fa5da98035b53e409fCVE reference
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.
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.