Multiple stack-based buffer overflows in Sarg might allow attackers to execute arbitrary code via unknown vectors, probably a crafted Squid log file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42321
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-1922
http://www.securityfocus.com/bid/29141
http://www.mandriva.com/security/advisories?name=MDVSA-2009:073
http://secunia.com/advisories/30202
http://secunia.com/advisories/30156
http://lists.opensuse.org/opensuse-security-announce/2008-05/msg00000.html