CVE-2017-1084

HIGH

FreeBSD < 11.2 - Stack-Based Buffer Overflow via Stack Guard-Page Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2017-1084. PoCs published by Qualys Corporation.

AI-analyzed exploit summary This exploit targets a memory management vulnerability in FreeBSD (CVE-2017-1084) by exhausting memory mappings and triggering a stack clash. It demonstrates a local privilege escalation by corrupting memory boundaries.

Description

In FreeBSD before 11.2-RELEASE, multiple issues with the implementation of the stack guard-page reduce the protections afforded by the guard-page. This results in the possibility a poorly written process could be cause a stack overflow.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Qualys Corporation · cdosfreebsd_x86
https://www.exploit-db.com/exploits/42277

This exploit targets a memory management vulnerability in FreeBSD (CVE-2017-1084) by exhausting memory mappings and triggering a stack clash. It demonstrates a local privilege escalation by corrupting memory boundaries.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: FreeBSD (specific version not specified in code)
No auth needed
Prerequisites: Local access to the target system · Compilation with -O0 flag
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Qualys Corporation · cdosfreebsd_x86
https://www.exploit-db.com/exploits/42278

This exploit targets a stack clash vulnerability in FreeBSD (CVE-2017-1084) by manipulating stack growth and memory allocation to trigger a collision. It uses recursive functions and memory mapping to achieve local privilege escalation.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: FreeBSD (specific version not specified in code)
No auth needed
Prerequisites: Local access to the target system · Compilation with -O0 flag
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42277/
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42278/

Scores

CVSS v3 7.5
EPSS 0.2445
EPSS Percentile 96.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-119
Status published
Products (1)
freebsd/freebsd < 11.2
Published Sep 12, 2018
Tracked Since Feb 18, 2026