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Vulnerability record · CVE-2013-2171 · published 2 July 2013

CVE-2013-2171: Freebsd permissions and access controls vulnerability

Freebsd · Freebsd

The vm_map_lookup function in sys/vm/vm_map.c in the mmap implementation in the kernel in FreeBSD 9.0 through 9.1-RELEASE-p4 does not properly determine whether a task should have write access to a memory location, which allows local users to bypass filesystem write permissions and consequently gain privileges via a crafted application that leverages read permissions, and makes mmap and ptrace system calls.

6.9 CVSS 2.0 Medium EPSS 6.9% · top 6.1% CWE-264 · Permissions and access controls
6.9CVSS 2.0 base score
6.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

The vm_map_lookup function in sys/vm/vm_map.c in the mmap implementation in the kernel in FreeBSD 9.0 through 9.1-RELEASE-p4 does not properly determine whether a task should have write access to a memory location, which allows local users to bypass filesystem write permissions and consequently gain privileges via a crafted application that leverages read permissions, and makes mmap and ptrace system calls.

AV:L/AC:M/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://svnweb.freebsd.org/base?view=revision&revision=251901
http://www.debian.org/security/2013/dsa-2714
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:06.mmap.asc Vendor Advisory
http://svnweb.freebsd.org/base?view=revision&revision=251901
http://www.debian.org/security/2013/dsa-2714
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:06.mmap.asc Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2013-2171), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.