util-linux (script) command hardlink can be used to overwrite files
| util-linux-script-hardlink (7718) |  Medium Risk |
Description:
The util-linux (script) command could allow a local attacker to overwrite files. An attacker could set hardlinks from the typescript log file to any file on the system, which would be overwritten once a root user executes the script command.
Platforms Affected:
- Kernel, util-linux
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Linux Advanced Workstation 2.1 Itanium
Remedy:
Upgrade to the latest version of util-linux (2.11n or later), available from the Linux Kernel Archives FTP site. See References.
For Red Hat Linux:
Refer to RHSA-2005:782-12 for patch, upgrade, or suggested workaround information. See References.
Consequences:
File Manipulation
References:
- BugTraq Mailing List, Wed Dec 12 2001 - 17:22:43 CST, Silly 'script' hardlink bug at http://archives.neohapsis.com/archives/bugtraq/2001-12/0118.html.
- BugTraq Mailing List, Wed Dec 12 2001 - 17:22:43 CST, Silly 'script' hardlink bug - fixed at http://archives.neohapsis.com/archives/bugtraq/2001-12/0118.html.
- Linux Kernel Archives FTP site, /pub/linux/utils/util-linux/ at ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
- ASA-2006-014: util-linux and mount security update (RHSA-2005-782)
- BID-16280: Util-Linux Script Command Arbitrary File Overwrite Vulnerability
- CVE-2001-1494: script command in the util-linux package before 2.11n allows local users to overwrite arbitrary files by setting a hardlink from the typescript log file to any file on the system, then having root execute the script command.
- RHSA-2005-782: util-linux and mount security update
- SA16785: util-linux umount "-r" Re-Mounting Security Issue
- SA18502: Avaya Products util-linux / mount Security Issue and Vulnerability
Reported:
Dec 12, 2001
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