freshclam in (1) Clam Antivirus (ClamAV) 0.88 and (2) ClamXav 1.0.3h and earlier does not drop privileges before processing the config-file command line option, which allows local users to read portions of arbitrary files when an error message displays the first line of the target file.
Buffer overflow in the get_database function in the HTTP client in Freshclam in ClamAV 0.80 to 0.88.1 might allow remote web servers to execute arbitrary code via long HTTP headers.
Integer overflow in the cli_scanpe function in the PE header parser (libclamav/pe.c) in Clam AntiVirus (ClamAV) before 0.88.1, when ArchiveMaxFileSize is disabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code.
The cli_bitset_set function in libclamav/others.c in Clam AntiVirus (ClamAV) before 0.88.1 allows remote attackers to cause a denial of service via unspecified vectors that trigger an "invalid memory access."