Security readout for executives and security teams
Plain-English summary
Rsync-ssl could accept a valid TLS certificate for the wrong hostname. An attacker able to intercept traffic could impersonate the rsync endpoint and read or alter transferred data. The sources do not show active exploitation or CVSS scoring.
Executive priority
Treat as a targeted data protection risk, not a broad emergency. Prioritize systems moving sensitive data over rsync-ssl before 3.2.4.
Technical view
CVE-2020-14387 is a CWE-297 certificate hostname validation flaw in rsync versions since 3.2.0pre1 and before 3.2.4. A remote unauthenticated man-in-the-middle attacker could use a valid certificate for another hostname against rsync-ssl traffic.
Likely exposure
Exposure is most likely where rsync-ssl is used with rsync versions earlier than 3.2.4, especially across untrusted or interceptable networks.
Exploitation context
The cited description requires a man-in-the-middle position and a valid certificate for another hostname. KEV is false, and no provided source cites active exploitation.
Researcher notes
The bundle’s affected field is inconsistent, listing rsync 3.2.4 while the description says versions before 3.2.4 are affected. Base assessment on the description unless vendor guidance clarifies otherwise.
Mitigation direction
- Upgrade rsync deployments using rsync-ssl to version 3.2.4 or later.
- Check operating system vendor advisories and packages for backported fixes.
- Prioritize internet-routed or third-party network rsync-ssl transfers.
- Use trusted network paths until affected rsync-ssl deployments are remediated.
Validation and detection
- Inventory rsync versions on systems performing rsync-ssl transfers.
- Confirm whether rsync-ssl is used for sensitive data movement.
- Review package changelogs for CVE-2020-14387 or rsync 3.2.4 fixes.
- Validate that endpoint certificates match expected hostnames after remediation.
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-297: 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-2020-14387 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://bugzilla.redhat.com/show_bug.cgi?id=1875549CVE 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.