Security readout for executives and security teams
Plain-English summary
FreeBSD 4.2 and 4.3 had a flaw in the rmuser account-removal utility. While updating password data, it could briefly create a world-readable copy of the master.passwd file. A local user could read password hashes and attempt to crack them, potentially gaining higher privileges.
Executive priority
Prioritize only if legacy FreeBSD 4.2 or 4.3 systems remain in use. The vulnerability is old and local-only, but password hash exposure can create serious account compromise risk on shared or multi-user systems.
Technical view
CVE-2001-1017 affects the rmuser utility in FreeBSD 4.2 and 4.3. During password file updates, rmuser creates a copy of master.passwd with world-readable permissions. The issue is local-only and time-dependent: an unprivileged local user would need access while rmuser is running to obtain password hashes.
Likely exposure
Exposure is most likely limited to legacy FreeBSD 4.2 or 4.3 systems where local shell users exist and rmuser is used. Modern or upgraded FreeBSD systems are not identified as affected in the provided sources.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked KEV. Exploitation requires local access and timing the rmuser operation. The main risk is offline password cracking from exposed hashes, followed by credential reuse or privilege escalation.
Researcher notes
Evidence is limited to the CVE description and IBM X-Force reference. No CVSS, CWE, patch detail, or exploit-in-the-wild evidence is provided. Avoid assuming affected versions beyond FreeBSD 4.2 and 4.3.
Mitigation direction
- Identify and retire or isolate any FreeBSD 4.2 or 4.3 systems.
- Check FreeBSD vendor guidance or historical advisories for an official correction.
- Limit local shell access on any affected legacy host.
- Rotate credentials if password hashes may have been exposed.
- Monitor for unexpected reads of password database files where logging exists.
Validation and detection
- Inventory systems for FreeBSD 4.2 or 4.3.
- Confirm whether rmuser is present and used for account removal.
- Review local-user access on affected hosts.
- Check historical logs for rmuser activity during suspicious local sessions.
- Assess whether exposed password hashes require password resets.
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.
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-2001-1017 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
- rmuser-insecure-password-file(7086)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.