libclamav/others.c in ClamAV before 0.90.3 and 0.91 before 0.91rc1 uses insecure permissions for temporary files that are created by the cli_gentempstream function in clamd/clamdscan, which might allow local users to read sensitive files.
http://secunia.com/advisories/25523
http://secunia.com/advisories/25525
http://secunia.com/advisories/25688
http://secunia.com/advisories/25796
http://security.gentoo.org/glsa/glsa-200706-05.xml
http://www.debian.org/security/2007/dsa-1320
http://www.novell.com/linux/security/advisories/2007_33_clamav.html