ClamAVcli_url_canon()" Buffer Overflow and UPack DoS Vulnerabilities

Multiple vulnerabilities have been identified in ClamAV, which could be exploited by attackers or malware to cause a denial of service or compromise a vulnerable system.

1. A buffer overflow error in the "cli_url_canon()" [libclamav/phishcheck.c] function when processing specially crafted URLs, which could be exploited by attackers to compromise a vulnerable system.

2. An error when processing malformed files packed with UPack, which could be exploited by attackers or malware to crash an affected application.