Description

Integer signedness error in the fw_ioctl (FW_IOCTL) function in the FireWire (IEEE-1394) drivers (dev/firewire/fwdev.c) in various BSD kernels, including DragonFlyBSD, FreeBSD 5.5, MidnightBSD 0.1-CURRENT before 20061115, NetBSD-current before 20061116, NetBSD-4 before 20061203, and TrustedBSD, allows local users to read arbitrary memory contents via certain negative values of crom_buf->len in an FW_GCROM command. NOTE: this issue has been labeled as an integer overflow, but it is more like an integer signedness error.

Affected Products 5

References 19

• archives.neohapsis.com http://archives.neohapsis.com/archives/fulldisclosure/2006-11/0261.html
• cvsweb.netbsd.org http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/ieee1394/fwdev.c
• mail-index.netbsd.org http://mail-index.netbsd.org/tech-security/2006/11/16/0001.html
• mail-index.netbsd.org http://mail-index.netbsd.org/tech-security/2006/12/14/0002.html
• secunia.com http://secunia.com/advisories/22917
  Vendor Advisory
• security.freebsd.org http://security.freebsd.org/advisories/FreeBSD-SA-06:25.kmem.asc
• securitytracker.com http://securitytracker.com/id?1017344
• dragonflybsd.org http://www.dragonflybsd.org/cvsweb/src/sys/bus/firewire/fwdev.c
• kernelhacking.com http://www.kernelhacking.com/bsdadv1.txt
  Vendor Advisory
• securityfocus.com http://www.securityfocus.com/archive/1/451629/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/451637/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/451677/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/451698/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/451861/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/452124/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/452264/100/0/threaded
• securityfocus.com http://www.securityfocus.com/archive/1/452331/100/0/threaded
• securityfocus.com http://www.securityfocus.com/bid/21089
• exchange.xforce.ibmcloud.com https://exchange.xforce.ibmcloud.com/vulnerabilities/30347

Remediation