Security readout for executives and security teams
Plain-English summary
CVE-1999-0414 is an old Linux kernel issue affecting versions before 2.0.36. A remote attacker could spoof a TCP connection and get data accepted by an application before the connection was fully established. The main concern is legacy or embedded systems still running very old Linux kernels.
Executive priority
Treat this as a legacy-risk finding. It is not supported by active-exploitation evidence in the provided sources, but any system still running Linux before 2.0.36 represents broader operational and security debt that should be retired or isolated.
Technical view
The source description says Linux before 2.0.36 could pass attacker-supplied data to the application layer during an incompletely established TCP connection. The bundle provides no CVSS score, CWE, distribution mapping, proof-of-concept detail, or vendor remediation text beyond the affected kernel version statement.
Likely exposure
Exposure is likely limited to obsolete Linux systems running kernels earlier than 2.0.36. Modern maintained Linux distributions should not normally be affected, but legacy appliances, abandoned embedded devices, or archived servers need inventory confirmation.
Exploitation context
The provided KEV flag is false, and the source bundle does not cite active exploitation. The issue is remotely reachable in principle because it concerns TCP connection spoofing, but the sources do not describe prerequisites, real-world exploitation, or affected services.
Researcher notes
Evidence is sparse: no CVSS, CWE, CPE, exploit status, or detailed advisory text is included. Analysis should stay anchored to the CVE description and confirm exposure through kernel inventory rather than assuming affected distributions or applications.
Mitigation direction
- Inventory systems for Linux kernel versions earlier than 2.0.36.
- Retire or upgrade any systems still running affected kernels.
- Check vendor or distribution archival guidance for legacy remediation details.
- Restrict network exposure for unavoidable legacy systems.
- Use segmentation and monitoring around affected legacy TCP services.
Validation and detection
- Confirm kernel versions on legacy Linux hosts and appliances.
- Identify internet-facing or untrusted-network services on affected systems.
- Review vendor or distribution records for historical fixes.
- Verify compensating controls block unnecessary inbound TCP access.
- Document residual risk for systems that cannot be upgraded.
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.
CVE-1999-0414 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://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0414CVE 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.