CVE-2011-1739: n/a vulnerability

CVE-2011-1739: The makemask function in mountd.c in mountd in FreeBSD 7.4 through 8.2 does not properly handle a -network...

The makemask function in mountd.c in mountd in FreeBSD 7.4 through 8.2 does not properly handle a -network field specifying a CIDR block with a prefix length that is not an integer multiple of 8, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances via an NFS mount request.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:37 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-1739 is an access-control bypass in FreeBSD mountd for NFS exports. When an export uses a CIDR -network prefix length that is not a multiple of 8, mountd may calculate access controls incorrectly. In opportunistic cases, a remote host could mount an export administrators intended to restrict. Exposure is most likely on legacy FreeBSD 7.4 through 8.2 systems running mountd/NFS with exports using -network CIDR prefixes not divisible by 8. Internet or untrusted-network reachability would raise urgency. Treat as a targeted legacy infrastructure risk. It is not supported by active exploitation evidence in the bundle, but it can undermine NFS access restrictions where affected FreeBSD systems remain in service. Mitigation focus: Review FreeBSD-SA-11:01 and apply vendor-supported updates or corrections.; Identify and remediate affected FreeBSD 7.4 through 8.2 NFS servers.; Restrict mountd and NFS reachability to trusted administrative networks..

Prepared: Jun 24, 2026, 13:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CVE-2011-1739 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 3, 2011, 20:00 UTC (UTC+00:00)

Official CVE source material

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.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

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
freebsd-mountd-security-bypass(66981)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.