Security readout for executives and security teams
This is an old SSH username-enumeration issue. A remote person could tell whether an account name exists because valid and invalid usernames received different password-prompt behavior. It does not grant access by itself, but it can make password attacks and targeted intrusion attempts more efficient. Likely exposure is limited to legacy systems running SSH 2.0.12 or related affected SSH builds. Organizations with old Unix, network appliance, lab, or forgotten internet-facing SSH services should verify versions and support status. Treat this as a legacy hygiene and exposure-reduction issue, not an emergency without active exploitation evidence. Prioritize externally reachable or business-critical SSH servers first. Mitigation focus: Inventory internet-facing and internal SSH services for legacy versions.; Check vendor or distribution guidance for affected SSH packages.; Replace unsupported SSH builds with maintained vendor-supported releases..
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-1999-1231 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
- ssh-leak(2276)CVE reference · vdb-entry, x_refsource_XF
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.