#792924 dhclient -r overflows buffer every time

Package:
isc-dhcp-client
Source:
isc-dhcp
Description:
DHCP client for automatically obtaining an IP address
Submitter:
積丹尼 Dan Jacobson
Date:
2026-08-05 17:34:01 UTC
Severity:
normal
#792924#5
Date:
2015-07-20 08:06:42 UTC
From:
To:
# dhclient -v -r
*** buffer overflow detected ***: dhclient terminated
======= Backtrace: =========
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x69409)[0xb73b0409]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__fortify_fail+0x37)[0xb743f7c7]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0xf69ca)[0xb743d9ca]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__strcpy_chk+0x37)[0xb743cf27]
dhclient(+0x23923)[0xb7721923]
dhclient(main+0x613)[0xb7704703]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xde)[0xb735f71e]
dhclient(+0x74de)[0xb77054de]
======= Memory map: ========
b6f07000-b6f23000 r-xp 00000000 08:07 655540     /lib/i386-linux-gnu/libgcc_s.so.1
b6f23000-b6f24000 rw-p 0001b000 08:07 655540     /lib/i386-linux-gnu/libgcc_s.so.1
b6f33000-b6f3f000 r-xp 00000000 08:07 660558     /lib/i386-linux-gnu/i686/cmov/libnss_files-2.21.so
b6f3f000-b6f40000 r--p 0000b000 08:07 660558     /lib/i386-linux-gnu/i686/cmov/libnss_files-2.21.so
b6f40000-b6f41000 rw-p 0000c000 08:07 660558     /lib/i386-linux-gnu/i686/cmov/libnss_files-2.21.so
b6f41000-b7333000 rw-p 00000000 00:00 0
b7333000-b733f000 r-xp 00000000 08:07 657484     /lib/i386-linux-gnu/libisccfg-export.so.90.1.0
b733f000-b7340000 r--p 0000b000 08:07 657484     /lib/i386-linux-gnu/libisccfg-export.so.90.1.0
b7340000-b7341000 rw-p 0000c000 08:07 657484     /lib/i386-linux-gnu/libisccfg-export.so.90.1.0
b7341000-b7342000 rw-p 00000000 00:00 0
b7342000-b7345000 r-xp 00000000 08:07 660552     /lib/i386-linux-gnu/i686/cmov/libdl-2.21.so
b7345000-b7346000 r--p 00002000 08:07 660552     /lib/i386-linux-gnu/i686/cmov/libdl-2.21.so
b7346000-b7347000 rw-p 00003000 08:07 660552     /lib/i386-linux-gnu/i686/cmov/libdl-2.21.so
b7347000-b74f8000 r-xp 00000000 08:07 660549     /lib/i386-linux-gnu/i686/cmov/libc-2.21.so
b74f8000-b74fb000 r--p 001b0000 08:07 660549     /lib/i386-linux-gnu/i686/cmov/libc-2.21.so
b74fb000-b74fd000 rw-p 001b3000 08:07 660549     /lib/i386-linux-gnu/i686/cmov/libc-2.21.so
b74fd000-b74ff000 rw-p 00000000 00:00 0
b74ff000-b7556000 r-xp 00000000 08:07 655884     /lib/i386-linux-gnu/libisc-export.so.95.5.0
b7556000-b7557000 r--p 00057000 08:07 655884     /lib/i386-linux-gnu/libisc-export.so.95.5.0
b7557000-b7558000 rw-p 00058000 08:07 655884     /lib/i386-linux-gnu/libisc-export.so.95.5.0
b7558000-b7559000 rw-p 00000000 00:00 0
b7559000-b76b8000 r-xp 00000000 08:07 655890     /lib/i386-linux-gnu/libdns-export.so.100.2.2
b76b8000-b76ba000 r--p 0015e000 08:07 655890     /lib/i386-linux-gnu/libdns-export.so.100.2.2
b76ba000-b76bc000 rw-p 00160000 08:07 655890     /lib/i386-linux-gnu/libdns-export.so.100.2.2
b76bc000-b76c5000 r-xp 00000000 08:07 655448     /lib/i386-linux-gnu/libirs-export.so.91.0.0
b76c5000-b76c6000 r--p 00009000 08:07 655448     /lib/i386-linux-gnu/libirs-export.so.91.0.0
b76c6000-b76c7000 rw-p 0000a000 08:07 655448     /lib/i386-linux-gnu/libirs-export.so.91.0.0
b76d4000-b76d8000 rw-p 00000000 00:00 0
b76d8000-b76da000 r--p 00000000 00:00 0          [vvar]
b76da000-b76db000 r-xp 00000000 00:00 0          [vdso]
b76db000-b76fc000 r-xp 00000000 08:07 655416     /lib/i386-linux-gnu/ld-2.21.so
b76fc000-b76fd000 r--p 00020000 08:07 655416     /lib/i386-linux-gnu/ld-2.21.so
b76fd000-b76fe000 rw-p 00021000 08:07 655416     /lib/i386-linux-gnu/ld-2.21.so
b76fe000-b778b000 r-xp 00000000 08:07 277596     /sbin/dhclient
b778b000-b778c000 r--p 0008c000 08:07 277596     /sbin/dhclient
b778c000-b778e000 rw-p 0008d000 08:07 277596     /sbin/dhclient
b778e000-b7798000 rw-p 00000000 00:00 0
b9722000-b97bf000 rw-p 00000000 00:00 0          [heap]
bfd75000-bfd96000 rw-p 00000000 00:00 0          [stack]
13472 Aborted                 dhclient -v -r

#792924#12
Date:
2026-08-05 17:31:09 UTC
From:
To:
Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)