Security readout for executives and security teams
A very old flaw in the hybrid-6 IRC chat server, historically used on the EFnet network, let remote attackers crash the service or run commands by abusing the invite feature. This is legacy chat infrastructure from the late 1990s, not modern business software, so direct business impact today is minimal unless an organization still runs this specific server. Extremely limited. Exposure is confined to systems still running the hybrid-6 IRC daemon on network-reachable ports (traditionally TCP/6667). Enterprise environments almost never host this software today. Any residual instances would be niche community or hobbyist IRC servers, not typical corporate assets. Informational only. This is a historic 1999-era vulnerability in niche chat server software with no evidence of modern exploitation and virtually no enterprise footprint. No action is required unless an inventory review unexpectedly identifies a legacy hybrid-6 IRC server still in operation. Mitigation focus: Confirm no hybrid-6 IRC daemon instances are running on production or lab hosts.; If IRC services are required, upgrade to a current, maintained ircd fork rather than hybrid-6.; Block inbound TCP/6667 and related IRC ports at the perimeter unless explicitly needed..
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-1999-0679 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
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.