wan/sdla.c in Linux kernel 2.6.x before 2.6.11 and 2.4.x before 2.4.29 does not require the CAP_SYS_RAWIO privilege for an SDLA firmware upgrade, with unknown impact and local attack vectors. NOTE: further investigation suggests that this issue requires root privileges to exploit, since it is protected by CAP_NET_ADMIN; thus it might not be a vulnerability, although capabilities provide finer distinctions between privilege levels.
http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2006:044
http://www.securityfocus.com/bid/16304
http://www.debian.org/security/2006/dsa-1017
http://secunia.com/advisories/19374
http://secunia.com/advisories/18977