Security readout for executives and security teams
Plain-English summary
CVE-2020-3298 can make affected Cisco ASA or FTD security devices reload when they process malformed OSPF traffic. The business impact is availability: client traffic passing through the device can be interrupted. The source bundle does not include affected version ranges or fixed release details.
Executive priority
Treat as high priority for environments relying on Cisco ASA or FTD for traffic continuity. This is not a data-theft issue in the supplied evidence, but device reloads can create outages on critical network paths.
Technical view
The issue is in the OSPF implementation of Cisco ASA Software and Cisco FTD Software. Improper memory protection while processing certain OSPF packets can allow an unauthenticated remote attacker to trigger device reload and denial of service. CVSS v3.0 is 8.6, availability impact high, mapped to CWE-125.
Likely exposure
Exposure is most likely where Cisco ASA or FTD devices process OSPF traffic and are reachable by traffic capable of reaching that OSPF processing path. The provided affected-version evidence is incomplete, so teams should confirm product and release applicability against Cisco’s advisory.
Exploitation context
The CVE description says exploitation requires malformed OSPF packet processing and can cause a reload. The source bundle does not show CISA KEV listing or other evidence of active exploitation, so active exploitation should not be assumed.
Researcher notes
Key constraints are OSPF processing reachability and affected Cisco software status. The bundle gives CVSS, CWE, impact, and trigger class, but not affected version ranges, patch levels, workaround text, or exploitation-in-the-wild evidence.
Mitigation direction
- Review Cisco’s advisory for affected releases, fixed software, and official mitigations.
- Identify ASA and FTD deployments that use OSPF or process OSPF traffic.
- Prioritize remediation for perimeter, hub, or high-traffic devices where reloads disrupt business services.
- Limit routing-protocol exposure to trusted network paths where consistent with Cisco guidance.
Validation and detection
- Confirm whether deployed Cisco ASA or FTD software versions match Cisco’s affected-release guidance.
- Check device configurations for OSPF use on interfaces reachable from less-trusted networks.
- Review logs and monitoring for unexplained ASA or FTD reloads around OSPF activity.
- Validate that remediation follows Cisco’s advisory and does not break required routing.
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-125: 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-2020-3298 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
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/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:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200506 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Malformed OSPF Packets Processing Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.