CVE-2013-2171

medium

Published 2013-07-02 · Modified 2026-04-29

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

7.9

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.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-26368 local freebsd verified

Hunger · 2013-06-21

FreeBSD 9.0 < 9.1 - 'mmap/ptrace' Local Privilege Escalation

Source code queued for fetch — refresh in a moment.

EDB-26454 local freebsd verified

Metasploit · 2013-06-26

FreeBSD 9 - Address Space Manipulation Privilege Escalation (Metasploit)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_freebsd/local/mmap rank 500

FreeBSD 9 Address Space Manipulation Privilege Escalation

Source fetch failed: fetch_error — view the original via the link above.

OS impact

FreeBSD Affected 2 releases

Version	Status	Fixed in
9.1	Affected	—
9.0	Affected	—

References

CWEs

CWE-264

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.