route buffer overflow with certain parameters

Bug #1191504 reported by Casandro
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This bug affects 1 person
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Bug Description

root@server2:/etc# route -6 del ::/0 2a01:4f8:130:5044::3
*** buffer overflow detected ***: route terminated
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7fe6b9937817]
/lib/x86_64-linux-gnu/libc.so.6(+0x109710)[0x7fe6b9936710]
route[0x40500b]
route[0x401d58]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7fe6b984e76d]
route[0x401e65]
======= Memory map: ========
00400000-0040d000 r-xp 00000000 09:01 1572769 /sbin/route
0060c000-0060d000 r--p 0000c000 09:01 1572769 /sbin/route
0060d000-0060e000 rw-p 0000d000 09:01 1572769 /sbin/route
0060e000-0060f000 rw-p 00000000 00:00 0
00f95000-00fb6000 rw-p 00000000 00:00 0 [heap]
7fe6b919a000-7fe6b91af000 r-xp 00000000 09:01 523493 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fe6b91af000-7fe6b93ae000 ---p 00015000 09:01 523493 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fe6b93ae000-7fe6b93af000 r--p 00014000 09:01 523493 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fe6b93af000-7fe6b93b0000 rw-p 00015000 09:01 523493 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fe6b93d2000-7fe6b93d3000 rw-p 00000000 00:00 0
7fe6b93d3000-7fe6b93da000 r--s 00000000 09:01 1058545 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
7fe6b93da000-7fe6b93e7000 r--p 00000000 09:01 1843011 /usr/share/locale-langpack/de/LC_MESSAGES/net-tools.mo
7fe6b93e7000-7fe6b982d000 r--p 00000000 09:01 1047396 /usr/lib/locale/locale-archive
7fe6b982d000-7fe6b99e2000 r-xp 00000000 09:01 582746 /lib/x86_64-linux-gnu/libc-2.15.so
7fe6b99e2000-7fe6b9be1000 ---p 001b5000 09:01 582746 /lib/x86_64-linux-gnu/libc-2.15.so
7fe6b9be1000-7fe6b9be5000 r--p 001b4000 09:01 582746 /lib/x86_64-linux-gnu/libc-2.15.so
7fe6b9be5000-7fe6b9be7000 rw-p 001b8000 09:01 582746 /lib/x86_64-linux-gnu/libc-2.15.so
7fe6b9be7000-7fe6b9bec000 rw-p 00000000 00:00 0
7fe6b9bec000-7fe6b9c0e000 r-xp 00000000 09:01 582760 /lib/x86_64-linux-gnu/ld-2.15.so
7fe6b9de7000-7fe6b9dea000 rw-p 00000000 00:00 0
7fe6b9e0c000-7fe6b9e0e000 rw-p 00000000 00:00 0
7fe6b9e0e000-7fe6b9e0f000 r--p 00022000 09:01 582760 /lib/x86_64-linux-gnu/ld-2.15.so
7fe6b9e0f000-7fe6b9e11000 rw-p 00023000 09:01 582760 /lib/x86_64-linux-gnu/ld-2.15.so
7fff839c8000-7fff839e9000 rw-p 00000000 00:00 0 [stack]
7fff839ff000-7fff83a00000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Abgebrochen (Speicherabzug geschrieben)

This happens on 2 10.04.2 LTS systems with different configuration.

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