Real $URL. Replace tar.gz ASAP.
*** This bug has been marked as a duplicate of bug 323691 ***
CVE-2010-2075 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-2075): UnrealIRCd 3.2.8.1, as distributed on certain mirror sites from November 2009 through June 2010, contains an externally introduced modification (Trojan Horse) in the DEBUG3_DOLOG_SYSTEM macro, which allows remote attackers to execute arbitrary commands.