APC apcupsd denial of service
| apc-apcupsd-dos (5654) |  Medium Risk |
Description:
Apcupsd creates a world-writable file "apcupsd.pid" under /var/run/ at startup, which is used by the daemon's scripts to stop the apcupsd process during a restart or shutdown. A local attacker can overwrite the apcupsd.pid file with an arbitrary process ID to cause the system to crash, during restart or shutdown.
Platforms Affected:
- APC, Apcupsd 3.7.2
Remedy:
Upgrade to the latest version of apcupsd (3.8.0 or later), available from the APC UPS Daemon Web site. See References.
For Linux-Mandrake 7.2:
Upgrade to the latest version of apcupsd (3.8.0-1 or later), as listed in MandrakeSoft Security Advisory MDKSA-2000:077 : apcupsd. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- APC UPS Daemon, Apcupsd UPS daemon version 3.8.0 at http://www.sibbald.com/apcupsd/.
- BugTraq Mailing List, Wed Dec 06 2000 - 12:07:11 CST, apcupsd 3.7.2 Denial of Service at http://archives.neohapsis.com/archives/bugtraq/2000-12/0066.html.
- MandrakeSoft Security Advisory MDKSA-2000:077, apcupsd at http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2000:077.
- BID-2070: APC apcupsd Local Denial of Service Vulnerability
- CVE-2001-0040: 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.
Reported:
Dec 06, 2000
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