CVE-2011-1739 — 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

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MEDIUM

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

Published May 3, 2011

4.3

MEDIUM

CVSS 2.0

EPSS 1.28%

Description

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.28% 0.01282

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01282

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.28% (0.01282)	69.01th	v5 (v2026.06.15)
Jun 15, 2026	1.28% (0.01282)	66.20th	v5 (v2026.06.15)
Mar 17, 2025	0.34% (0.00336)	54.30th	v4 (v2025.03.14)
Dec 12, 2024	0.39% (0.00390)	74.11th	v3 (v2023.03.01)
Feb 8, 2024	0.39% (0.00390)	72.57th	v3 (v2023.03.01)
Mar 7, 2023	0.39% (0.00390)	69.09th	v3 (v2023.03.01)
Mar 6, 2023	1.32% (0.01319)	71.27th	v2 (v2022.01.01)
Feb 23, 2023	1.32% (0.01319)	71.23th	v2 (v2022.01.01)
Apr 1, 2022	1.32% (0.01319)	69.22th	v2 (v2022.01.01)
Feb 4, 2022	1.32% (0.01319)	44.98th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (6)

http://secunia.com/advisories/44307
third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://security.FreeBSD.org/advisories/FreeBSD-SA-11:01.mountd.asc
vendor-advisoryx_refsource_FREEBSD
http://securitytracker.com/id?1025425
vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/47517
vdb-entryx_refsource_BID
http://www.vupen.com/english/advisories/2011/1076
vdb-entryx_refsource_VUPENVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/66981
vdb-entryx_refsource_XF

Link	Providers	Tags
http://secunia.com/advisories/44307		third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://security.FreeBSD.org/advisories/FreeBSD-SA-11:01.mountd.asc		vendor-advisoryx_refsource_FREEBSD
http://securitytracker.com/id?1025425		vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/47517		vdb-entryx_refsource_BID
http://www.vupen.com/english/advisories/2011/1076		vdb-entryx_refsource_VUPENVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/66981		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner freebsd

Published May 3, 2011

Updated Aug 6, 2024

Reserved Apr 19, 2011

Link CVE-2011-1739

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-1739

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-1739