CVE-2010-4005: Code Injection

First published: Tue Oct 19 2010(Updated: )

Ludwig Nussel discovered that tomboy contained a script that could be abused by an attacker to execute arbitrary code. The vulnerability is due to an insecure change to LD_LIBRARY_PATH, and environment variable used by ld.so(8) to look for libraries in directories other than the standard paths. When there is an empty item in the colon-separated list of directories in LD_LIBRARY_PATH, ld.so(8) treats it as a '.' (current working directory). If the given script is executed from a directory where a local attacker could write files, there is a chance for exploitation. In Fedora, both /usr/bin/tomboy and /usr/bin/tomboy-panel re-set LD_LIBRARY_PATH insecurely: export LD_LIBRARY_PATH="/usr/lib/tomboy${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}" A solution is to patch the script to use ':+:' properly: export LD_LIBRARY_PATH=/usr/lib/foo${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}

Credit: cve@mitre.org

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