Date: Mon, 25 Dec 2000 03:21:57 +0100
From: Wichert Akkerman wichert@cistron.nl
To: debian-security-announce@lists.debian.org
Subject: [SECURITY] [DSA-009-1] multiple stunnel
vulnerabilities
Debian Security Advisory DSA-009-1 security@debian.org
http://www.debian.org/security/ Wichert Akkerman
December 25, 2000
Package : stunnel
Problem type : insecure file handling, format string bug
Debian-specific: no
Lez discovered a format string problem in stunnel (a tool to create
Universal SSL tunnel for other network daemons). Brian Hatch
responded by stating he was already preparing a new release with
multiple security fixes:
1. the PRNG (pseudo-random generated) was not seeded correctly.
This only affects operation on operating systems without a
secure random generator (like Linux)
2. Pid files were not created securely, making stunnel vulnerable
to a symlink attack
3. There was an insecure syslog() call which could be exploited if
the user could manage to insert text into the logged text. At
least one way to exploit this using faked identd responses was
demonstrated by Lez.
These problems have been fixed in version 3.10-0potato1.
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
Debian GNU/Linux 2.2 alias potato
Potato was released for alpha, arm, i386, m68k, powerpc and
sparc. At this moment no fix is available for arm, Once a fix for
that architecture will become available it will be announced on
http://security.debian.org/
Source archives:
http://security.debian.org/dists/stable/updates/main/source/stunnel_3.10-0potato1.diff.gz
MD5 checksum: 60d5aa858f0a06c2d419da3cf082edfd
http://security.debian.org/dists/stable/updates/main/source/stunnel_3.10-0potato1.dsc
MD5 checksum: 0cc18707e34df76f50ca1f8d3c4faeaa
http://security.debian.org/dists/stable/updates/main/source/stunnel_3.10.orig.tar.gz
MD5 checksum: eca047987da225a6e4e7bd705a81f2aa
Alpha architecture:
http://security.debian.org/dists/stable/updates/main/binary-alpha/stunnel_3.10-0potato1_alpha.deb
MD5 checksum: 832ad31f899dbc655b1796b56cb98c80
Intel ia32 architecture:
http://security.debian.org/dists/stable/updates/main/binary-i386/stunnel_3.10-0potato1_i386.deb
MD5 checksum: b64009319600749c58c60d39874db79d
Motorola 680×0 architecture:
http://security.debian.org/dists/stable/updates/main/binary-m68k/stunnel_3.10-0potato1_m68k.deb
MD5 checksum: 89c199d09858d14c9563522f4f6fba67
PowerPC architecture:
http://security.debian.org/dists/stable/updates/main/binary-powerpc/stunnel_3.10-0potato1_powerpc.deb
MD5 checksum: cd145736ba23c54f98a41afe7bb5469f
Sun Sparc architecture:
http://security.debian.org/dists/stable/updates/main/binary-sparc/stunnel_3.10-0potato1_sparc.deb
MD5 checksum: 12d12072d96e1ddc6caa50cbc179619f
These files will be moved into
ftp://ftp.debian.org/debian/dists/stable/*/binary-$arch/
soon.
For not yet released architectures please refer to the
appropriate directory ftp://ftp.debian.org/debian/dists/sid/binary-$arch/
.
apt-get: deb http://security.debian.org/
stable/updates main
dpkg-ftp: ftp://security.debian.org/debian-security
dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org