CVE-2001-0040

APC UPS daemon - Local Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-0040. PoCs published by the itch.

AI-analyzed exploit summary This exploit leverages a world-writable PID file in APCUPSD v3.7.2 to overwrite it with the PID of another process, causing a denial of service when APCUPSD is stopped or restarted. The code provides a menu-driven interface to target specific system daemons.

Description

APC UPS daemon, apcupsd, saves its process ID in a world-writable file, which allows local users to kill an arbitrary process by specifying the target process ID in the apcupsd.pid file.

Exploits (1)

exploitdb WORKING POC VERIFIED
by the itch · cdoslinux
https://www.exploit-db.com/exploits/251

This exploit leverages a world-writable PID file in APCUPSD v3.7.2 to overwrite it with the PID of another process, causing a denial of service when APCUPSD is stopped or restarted. The code provides a menu-driven interface to target specific system daemons.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: APCUPSD v3.7.2
No auth needed
Prerequisites: APCUPSD v3.7.2 running on Linux · World-writable PID file at /var/run/apcupsd.pid
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/2070
Various Sources vendor-advisory x_refsource_mandrake
http://www.linux-mandrake.com/en/security/MDKSA-2000-077.php3
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/5654
Exploit, Vendor Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2000-12/0066.html

Scores

EPSS 0.0086
EPSS Percentile 53.7%

Details

Status published
Products (1)
apc/apcupsd 3.7.2
Published Feb 16, 2001
Tracked Since Feb 18, 2026