MySQL: Insecure temporary file creation in mysqlhotcopy
Gentoo Linux Security Advisory
||GLSA 200409-02 / MySQL
||September 01, 2004
||September 01, 2004: 01
All supported architectures
The mysqlhotcopy utility can create temporary files with predictable paths,
allowing an attacker to use a symlink to trick MySQL into overwriting
MySQL is a popular open-source multi-threaded, multi-user SQL database
Jeroen van Wolffelaar discovered that the MySQL database hot copy utility
(mysqlhotcopy.sh), when using the scp method, uses temporary files with
predictable names. A malicious local user with write access to the /tmp
directory could create a symbolic link pointing to a file, which may then
be overwritten. In cases where mysqlhotcopy is run as root, a malicious
user could create a symlink to a critical file such as /etc/passwd and
cause it to be overwritten.
A local attacker could use this vulnerability to destroy other users' data
or corrupt and destroy system files, possibly leading to a denial of
There is no known workaround at this time.
All MySQL users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge sync
# emerge -pv ">=dev-db/mysql-4.0.20-r1"
# emerge ">=dev-db/mysql-4.0.20-r1"