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KDE dcopidlng: Insecure temporary file creation


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200503-14 / dcopidlng
Release Date March 07, 2005
Latest Revision March 07, 2005: 01
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
kde-base/kdelibs < 3.3.2-r5 >= 3.3.2-r5, revision >= 3.2.3-r7 All supported architectures

Related bugreports: #81652


The dcopidlng script is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.

2.  Impact Information


KDE is a feature-rich graphical desktop environment for Linux and Unix-like Operating Systems. DCOP is KDE's simple IPC/RPC mechanism. dcopidlng is a DCOP helper script.


Davide Madrisan has discovered that the dcopidlng script creates temporary files in a world-writable directory with predictable names.


A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When dcopidlng is executed, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.

3.  Resolution Information


There is no known workaround at this time.


All kdelibs users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose kde-base/kdelibs

4.  References


Page updated March 07, 2005

Summary: This is a Gentoo Linux Security Advisory

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