Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2005.0896 -- Debian Security Advisory DSA 885-1
New OpenVPN packages fix several vulnerabilities
8 November 2005
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AusCERT Security Bulletin Summary
---------------------------------
Product: openvpn
Publisher: Debian
Operating System: Debian GNU/Linux 3.1
UNIX variants
Mac OS X
Windows
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2005-3409 CVE-2005-3393
Original Bulletin: http://www.debian.org/security/2005/dsa-885
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running openvpn check for an updated version of the software for
their operating system.
The following additional information is available from the openvpn
change log (http://openvpn.net/changelog.html):
* Security fix CVE-2005-3393 -- Affects non-Windows OpenVPN clients
of version 2.0 or higher which connect to a malicious or
compromised server. A format string vulnerability in the
foreign_option function in options.c could potentially allow a
malicious or compromised server to execute arbitrary code on the
client. Only non-Windows clients are affected. The vulnerability
only exists if (a) the client's TLS negotiation with the server
succeeds, (b) the server is malicious or has been compromised such
that it is configured to push a maliciously crafted options string
to the client, and (c) the client indicates its willingness to
accept pushed options from the server by having "pull" or "client"
in its configuration file (Credit: Vade79).
* Security fix CVE-2005-3409 -- Potential DoS vulnerability on the
server in TCP mode. If the TCP server accept() call returns an
error status, the resulting exception handler may attempt to
indirect through a NULL pointer, causing a segfault. Affects all
OpenVPN 2.0 versions.
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Debian Security Advisory DSA 885-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
November 7th, 2005 http://www.debian.org/security/faq
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Package : openvpn
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2005-3393 CVE-2005-3409
CERT advisory :
BugTraq ID : 15239
Debian Bug : 336751 337334
Several vulnerabilities have been discovered in OpenVPN, a free
virtual private network daemon. The Common Vulnerabilities and
Exposures project identifies the following problems:
CVE-2005-3393
A format string vulnerability has been discovered that could allow
arbitrary code to be executed on the client.
CVE-2005-3409
A NULL pointer dereferencing has been discovered that could be
exploited to crash the service.
The old stable distribution (woody) does not contain openvpn packages.
For the stable distribution (sarge) these problems have been fixed in
version 2.0-1sarge2.
For the unstable distribution (sid) these problems have been fixed in
version 2.0.5-1.
We recommend that you upgrade your openvpn package.
Upgrade Instructions
- - --------------------
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 3.1 alias sarge
- - --------------------------------
Source archives:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2.dsc
Size/MD5 checksum: 629 1cea04a008a9b888b404c7ec2e5c2ef2
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2.diff.gz
Size/MD5 checksum: 52800 a48a32ae512664fa21ac2f18b13aca8b
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0.orig.tar.gz
Size/MD5 checksum: 639201 7401faebc6baee9add32608709c54eec
Alpha architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_alpha.deb
Size/MD5 checksum: 347438 9dcec8dd6cdf3efcaea58097a526d95d
AMD64 architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_amd64.deb
Size/MD5 checksum: 316598 34e437c2b5c671a0945e23dc314c7d61
ARM architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_arm.deb
Size/MD5 checksum: 296726 7eb2f74d7f6334aa864638b18261e6ed
Intel IA-32 architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_i386.deb
Size/MD5 checksum: 302630 b48bfb10468d6177ca5825382a5b9f3a
Intel IA-64 architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_ia64.deb
Size/MD5 checksum: 395760 ca6d5c797d96fccf4ff785406bc9cd8c
HP Precision architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_hppa.deb
Size/MD5 checksum: 316894 d8a83c52f67b478a7ac2481411b4850c
Motorola 680x0 architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_m68k.deb
Size/MD5 checksum: 276658 fb776634c4805ce5b3c98b34c244b8b8
Big endian MIPS architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_mips.deb
Size/MD5 checksum: 317832 400f6f80ece6d8937aca0500a47aaba8
Little endian MIPS architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_mipsel.deb
Size/MD5 checksum: 319656 ea3d192a110f8231ac4146490cd4ab46
PowerPC architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_powerpc.deb
Size/MD5 checksum: 309090 8baabfbe69032a23414ca0e97caec7b9
IBM S/390 architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_s390.deb
Size/MD5 checksum: 307492 c63d7c1f5ac2f469ecfdee8673da39d4
Sun Sparc architecture:
http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge2_sparc.deb
Size/MD5 checksum: 295050 913b178ac53ea6676600200c95be4f46
These files will probably be moved into the stable distribution on
its next update.
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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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