cvs not responding

[Kip Macy <kip@xxxxxxxxxxxxxxx>]

cvs -z3 update -d hangs:

the tail of strace is:

connect(3, {sin_family=AF_INET, sin_port=htons(2401),
sin_addr=inet_addr("216.32.174.118")}}, 16) = 0
access("/root/.cvspass", F_OK)          = 0
chmod("/root/.cvspass", 0600)           = 0
open("/root/.cvspass", O_RDONLY)        = 4
fstat64(0x4, 0xbffff788)                = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40015000
read(4, ":pserver:cvs@xxxxxxxxxxx:/cvs Ah"..., 4096) = 35
close(4)                                = 0
munmap(0x40015000, 4096)                = 0
send(3, "BEGIN AUTH REQUEST\n", 19, 0)  = 19
send(3, "/cvs", 4, 0)                   = 4
send(3, "\n", 1, 0)                     = 1
send(3, "cvs", 3, 0)                    = 3
send(3, "\n", 1, 0)                     = 1
send(3, "Ah<Z", 4, 0)                   = 4
send(3, "\n", 1, 0)                     = 1
send(3, "END AUTH REQUEST\n", 17, 0)    = 17
recv(3,