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.
References
- 20061116 Re: FreeBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- 1017344 vdb-entry
- 20061115 NetBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- 20061115 NetBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- [tech-security] 20061116 Re: [Full-disclosure] NetBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- FreeBSD-SA-06:25 vendor-advisory
- freebsd-fwdev-integer-overflow(30347) vdb-entry
- 20061121 Clarifying integer overflows vs. signedness errors mailing-list
- 20061122 Re: Clarifying integer overflows vs. signedness errors mailing-list
- 20061120 RE: FreeBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- [tech-security] 20061214 NetBSD Security Note 20061214-1: Kernel memory leakage in firewire interface mailing-list
- http://www.dragonflybsd.org/cvsweb/src/sys/bus/firewire/fwdev.c
- 21089 vdb-entry
- 22917 third-party-advisory
- 20061115 TrustedBSD* all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/ieee1394/fwdev.c
- 20061115 DragonFlyBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- 20061115 FreeBSD all versions FireWire IOCTL kernel integer overflow information disclousure mailing-list
- http://www.kernelhacking.com/bsdadv1.txt