Security readout for executives and security teams
Plain-English summary
CVE-2020-36923 affects Sony BRAVIA Digital Signage version 1.7.8 and earlier. Public advisories describe an authorization bypass where client-side restrictions can be manipulated to access hidden system resources. For organizations using BRAVIA signage software, this is high business urgency because compromise could affect confidentiality, content integrity, and service availability.
Executive priority
Treat as urgent for affected deployments. Prioritize inventory and exposure reduction first, because public exploit information exists and the vulnerability requires no authentication. Business risk is highest where signage systems are reachable from public or broad internal networks.
Technical view
The issue is categorized as CWE-639, insecure direct object reference. The CVSS 3.1 score is 9.8, with network access, low complexity, no privileges, and no user interaction. Sources describe bypassing client-side access controls to reach restricted application areas. The provided sources do not identify a specific vendor patch or fixed version.
Likely exposure
Exposure is likely limited to organizations running Sony BRAVIA Digital Signage software version 1.7.8 or earlier, especially if management interfaces are reachable over untrusted networks. Confirm product deployment and version before prioritizing response.
Exploitation context
Public exploit references exist in the supplied sources, including Packet Storm and Zero Science Lab materials. The CVE is not listed as KEV in the provided bundle, so there is no source-grounded evidence here of active exploitation in the wild.
Researcher notes
Evidence is based on public CVE, VulnCheck, Zero Science Lab, IBM X-Force, CXSecurity, Packet Storm, and Sony product/resource pages. The bundle names affected versions as <=1.7.8 but does not provide a confirmed patched version or Sony security advisory. Avoid assuming active exploitation without additional evidence.
Mitigation direction
- Identify all Sony BRAVIA Digital Signage deployments and versions.
- Restrict signage management interfaces to trusted administrative networks.
- Check Sony BRAVIA software resources for current vendor guidance or updates.
- Remove or isolate unsupported versions if no vendor fix is available.
- Review access controls for server-side authorization enforcement.
Validation and detection
- Confirm whether any deployment runs version 1.7.8 or earlier.
- Verify management interfaces are not internet-accessible.
- Review logs for unauthorized access to restricted signage functions.
- Validate that authorization is enforced server-side, not only in the browser.
- Document compensating controls where updates 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-639: 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-2020-36923 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- Zero Science Lab Disclosure (ZSL-2020-5611)CVE reference · third-party-advisory
- IBM X-Force Exchange Vulnerability EntryCVE reference · vdb-entry
- CXSecurity Vulnerability ListingCVE reference · third-party-advisory
- Packet Storm Security Exploit ArchiveCVE reference · exploit
- Sony Professional Display Software Product PageCVE reference · product
- BRAVIA Signage Software ResourcesCVE reference · product
- Sony BRAVIA Digital Signage Official HomepageCVE reference · product
- VulnCheck Advisory: Sony BRAVIA Digital Signage 1.7.8 Client-Side Protection Bypass via IDORCVE reference · third-party-advisory
- https://www.zeroscience.mk/codes/sonybravia_idor.txtCVE reference · exploit
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.