Security readout for executives and security teams
Plain-English summary
CVE-2020-27793 is an off-by-one overflow in radare2. The described impact is a crash that could cause denial of service. The public sources do not provide a CVSS score, exploitation evidence, or a detailed attack scenario. The issue is listed as fixed in radare2 v4.4.0.
Executive priority
Handle as a routine but necessary security update unless radare2 is used heavily on untrusted samples. Business risk is mainly interruption of analysis workflows, not confirmed data compromise, based on the provided evidence.
Technical view
The flaw is attributed to a mismatched array length in radare2's core_java.c, categorized as CWE-193. Public references point to a GitHub issue and fixing commit. Available data states crash and denial-of-service potential, but does not substantiate code execution, privilege escalation, or active exploitation.
Likely exposure
Exposure is most likely in environments running radare2 versions before v4.4.0, especially where the tool processes untrusted or adversary-supplied inputs. The source bundle does not define a precise attack vector or affected deployment model.
Exploitation context
There is no KEV listing and no cited evidence of active exploitation. Public information only supports a denial-of-service-style outcome through a crash. Treat exploitability details as incomplete based on the provided sources.
Researcher notes
The available record is sparse: no CVSS vector, no detailed reproducer context in the bundle, and no confirmed exploitation. Research should stay focused on version exposure, the core_java.c array-bound fix, and whether local workflows process untrusted inputs.
Mitigation direction
- Upgrade radare2 to v4.4.0 or later.
- Check the linked radare2 issue and commit for vendor context.
- Restrict untrusted input processing until updated.
- Run analysis tools in isolated environments where practical.
- Track radare2 versions in developer and security tooling inventories.
Validation and detection
- Inventory installed radare2 versions across workstations and analysis systems.
- Confirm affected installations are upgraded to v4.4.0 or later.
- Identify workflows where radare2 processes untrusted files.
- Review crash reports or tool failures around Java parsing workflows.
- Document residual exposure where upgrades are delayed.
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-193: 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-2020-27793 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/radareorg/radare2/issues/16304CVE reference · x_refsource_MISC
- https://github.com/radareorg/radare2/commit/ced0223c7a1b3b5344af315715cd28fe7c0d9ebcCVE 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.
Off-by-one Error
Off-by-one Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.