Fcron fcronsighup bypass restrictions
| fcron-fcronsighup-restrictions-bypass (18076) |  Medium Risk |
Description:
Fcron could allow a local attacker to bypass access restrictions, caused by a vulnerability in the fcronsighup tool, which instructs fcron to reread the fcron tables. A local attacker could point the fcronsighup configuration file to a root owned /proc entry to bypass restrictions and modify configuration settings.
Platforms Affected:
- FreeBSD, FreeBSD
- Gentoo, Linux
- OpenBSD, OpenBSD
- Thibault Godouet, Fcron 2.0.1
- Thibault Godouet, Fcron 2.9.4
Remedy:
Upgrade to the latest version of Fcron (2.0.2 or 2.9.5.1 or later), available from the Fcron Web site. See References.
For Gentoo Linux:
Upgrade to the latest version of Fcron (2.0.2, >= 2.9.5.1 or later), as listed in GLSA 200411-27. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Bypass Security
References:
- Fcron Web site, Welcome to Fcron's home page ! at http://fcron.free.fr/.
- iDEFENSE Security Advisory 11.15.04, Multiple Security Vulnerabilities in Fcron at http://www.idefense.com/application/poi/display?id=157&type=vulnerabilities&flashstatus=true.
- BID-11684: Fcron FCronTab/FCronSighUp Multiple Local Vulnerabilities
- CVE-2004-1031: fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to bypass access restrictions and load an arbitrary configuration file by starting an suid process and pointing the fcronsighup configuration file to a /proc entry that is owned by root but modifiable by the user, such as /proc/self/cmdline or /proc/self/environ.
- GLSA-200411-27: Fcron: Multiple vulnerabilities
Reported:
Nov 15, 2004
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