The scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 allows remote attackers to cause a denial of service (engine crash) via a CHM file with a large nb_dir value that triggers an out-of-bounds read.

Multiple unspecified vulnerabilities in the scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 allow remote attackers to cause a denial of service via (1) a crafted UPX-compressed file, which triggers an engine crash; (2) a crafted Microsoft Office file, which triggers an infinite loop; or (3) an ASPack-compressed file, which triggers an engine crash.

Heap-based buffer overflow in FRISK Software F-Prot Antivirus before 4.6.7 allows user-assisted remote attackers to execute arbitrary code via a crafted CHM file. NOTE: this issue has at least a partial overlap with CVE-2006-6294.

Frisk F-Prot Antivirus allows remote attackers to bypass protection via a ZIP file with a version header greater than 15, which prevents F-Prot from decompressing and analyzing the file.