ftpd, as used by Gentoo and Debian Linux, sets the gid to the effective uid instead of the effective group id before executing /bin/ls, which allows remote authenticated users to list arbitrary directories with the privileges of gid 0 and possibly enable additional attack vectors.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux | Gentoo | * | * |
| Linux-ftpd | Ubuntu | dapper | * |
| Linux-ftpd | Ubuntu | edgy | * |
| Linux-ftpd | Ubuntu | feisty | * |
References
- http://bugs.debian.org/384454
- http://bugs.gentoo.org/show_bug.cgi?id=155317
- http://osvdb.org/34242
- http://packages.qa.debian.org/l/linux-ftpd/news/20061125T181702Z.html
- http://securityreason.com/securityalert/2330
- http://www.securityfocus.com/archive/1/460742/100/0/threaded
- http://bugs.debian.org/384454
- http://bugs.gentoo.org/show_bug.cgi?id=155317
- http://osvdb.org/34242
- http://packages.qa.debian.org/l/linux-ftpd/news/20061125T181702Z.html
- http://securityreason.com/securityalert/2330
- http://www.securityfocus.com/archive/1/460742/100/0/threaded