sharutils temporary files symlink
| sharutils-temp-file-symlink (19957) |  Medium Risk |
Description:
The sharutils package, included with many Linux distributions, could allow a local attacker to launch a symlink attack. sharutils creates insecure temporary files. A local attacker could use this vulnerability to create symbolic links from a temporary file to create or overwrite arbitrary files on the system with user privileges.
Consequences:
File Manipulation
Remedy:
For Ubuntu Linux:
Upgrade to the latest sharutils package (1:4.2.1-10ubuntu0.2 or later), as listed in USN-104-1. See References.
For Turbolinux:
Upgrade to the latest sharutils package, as listed below. Refer to Turbolinux Security Advisory TLSA-2005-54 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition: 4.2.1-16 or later
Turbolinux 10 Server: 4.2.1-16 or later
Turbolinux Home: 4.2.1-16 or later
Turbolinux 10 Desktop: 4.2.1-16 or later
Turbolinux 8 Server: 4.2.1-16 or later
Turbolinux 8 Workstation: 4.2.1-16 or later
Turbolinux 7 Server: 4.2.1-16 or later
Turbolinux 7 Workstation: 4.2.1-16 or later
For Red Hat Linux:
Refer to RHSA-2005:377-07 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2005-04-06 for patch, upgrade, or suggested workaround information. See References.
References:
- CIAC INFORMATION BULLETIN P-194: Buffer Overflow in sharutils.
- BID-12981: GNU Sharutils Unshar Local Insecure Temporary File Creation Vulnerability
- CVE-2005-0990: unshar (unshar.c) in sharutils 4.2.1 allows local users to overwrite arbitrary files via a symlink attack on the unsh.X temporary file.
- GLSA-200504-06: sharutils: Insecure temporary file creation
- RHSA-2005-377: sharutils security update
Platforms Affected:
- Canonical Ubuntu 4.10
- Gentoo Linux
- GNU sharutils 4.2.1
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 2.1 AS
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 3 Desktop
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 ES
- RedHat Linux Advanced Workstation 2.1 Itanium
- Turbolinux Turbolinux 10 Desktop
- Turbolinux Turbolinux 10 F...
- Turbolinux Turbolinux 10 Server
- Turbolinux Turbolinux 7 Server
- Turbolinux Turbolinux 7 Workstation
- Turbolinux Turbolinux 8 Server
- Turbolinux Turbolinux 8 Workstation
- Turbolinux Turbolinux Home
- Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
Reported:
Apr 04, 2005
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