Security readout for executives and security teams
Plain-English summary
CVE-2020-27795 is a crash bug in radare2. A malformed or missing argument to an analysis command can make the tool dereference a null function pointer and terminate. Business impact is mainly disruption to reverse-engineering or analysis workflows, not confirmed data theft or remote compromise.
Executive priority
Handle as routine maintenance unless radare2 is embedded in critical automated analysis workflows. Prioritize upgrade where crashes could interrupt malware triage, incident response, or file-analysis pipelines.
Technical view
In radare2 libr/core/cmd_anal.c, the adf command path calls anal_fcn_data, where r_anal_get_fcn_in can return null. That null RAnalFunction pointer is later passed into ensure_fcn_range, causing a segmentation fault. Sources state the issue is fixed in v4.4.0.
Likely exposure
Exposure is most likely where radare2 versions before v4.4.0 are used by analysts, security teams, or automated tooling. The source bundle does not identify broader affected products or deployment-specific exposure.
Exploitation context
The sources describe a denial-of-service style crash in a local analysis tool. CISA KEV status is false, and the provided sources do not claim active exploitation or a public weaponized exploit.
Researcher notes
The public record is narrow: issue, pull request, and commit evidence support a null-pointer crash and fixed version. No CVSS vector, affected version range, or active exploitation evidence is provided in the source bundle.
Mitigation direction
- Upgrade radare2 to v4.4.0 or later.
- Check radare2 vendor guidance for any additional advisory details.
- Limit automated analysis of untrusted inputs on outdated radare2 versions.
- Monitor analysis systems for repeated radare2 crash patterns.
Validation and detection
- Inventory radare2 installations and record installed versions.
- Confirm no production analysis host runs a version before v4.4.0.
- Review crash logs for segmentation faults involving radare2 analysis commands.
- Verify automated pipelines use the upgraded radare2 binary.
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
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CWE-908: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-27795 mapping review
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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/16215CVE reference · x_refsource_MISC
- https://github.com/radareorg/radare2/pull/16230CVE reference · x_refsource_MISC
- https://github.com/radareorg/radare2/commit/4d3811681a80f92a53e795f6a64c4b0fc2c8dd22CVE 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.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.