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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0788 -- Debian Security Advisory DSA 851-1 New openvpn packages fix denial of service 10 October 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openvpn Publisher: Debian Operating System: Linux variants Windows BSD variants Mac OS X Solaris Impact: Denial of Service Access: Remote/Unauthenticated CVE Names: CAN-2005-2534 CAN-2005-2533 CAN-2005-2532 CAN-2005-2531 Original Bulletin: http://www.debian.org/security/2005/dsa-851 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. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - -------------------------------------------------------------------------- Debian Security Advisory DSA 851-1 security@debian.org http://www.debian.org/security/ Martin Schulze October 9th, 2005 http://www.debian.org/security/faq - - -------------------------------------------------------------------------- Package : openvpn Vulnerability : programming errors Problem type : remote Debian-specific: no CVE ID : CAN-2005-2531 CAN-2005-2532 CAN-2005-2533 CAN-2005-2534 Debian Bug : 324167 Several security related problems have been discovered in openvpn, a Virtual Private Network daemon. The Common Vulnerabilities and Exposures project identifies the following problems: CAN-2005-2531 Wrong processing of failed certificate authentication when running with "verb 0" and without TLS authentication can lead to a denial of service by disconnecting the wrong client. CAN-2005-2532 Wrong handling of packets that can't be decrypted on the server can lead to the disconnection of unrelated clients. CAN-2005-2533 When running in "dev tap" Ethernet bridging mode, openvpn can exhaust its memory by receiving a large number of spoofed MAC addresses and hence denying service. CAN-2005-2534 Simultaneous TCP connections from multiple clients with the same client certificate can cause a denial of service when --duplicate-cn is not enabled. The old stable distribution (woody) does not contain openvpn packages. For the stable distribution (sarge) these problems have been fixed in version 2.0-1sarge1. For the unstable distribution (sid) these problems have been fixed in version 2.0.2-1. 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_2.0-1sarge1.dsc Size/MD5 checksum: 629 1fee867074a153eac1f82d11e75aa833 http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.diff.gz Size/MD5 checksum: 51566 578da11dd408ea72e4791646e700dac4 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_2.0-1sarge1_alpha.deb Size/MD5 checksum: 347184 ed8f3706d9f7af8b4baf148786141e5a AMD64 architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_amd64.deb Size/MD5 checksum: 316422 3dfdd5a007c62ceb28153e63677a884a ARM architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_arm.deb Size/MD5 checksum: 296464 20f23e0a9f251eedc340e926f455c8e0 Intel IA-32 architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_i386.deb Size/MD5 checksum: 302424 fe92352695fd5fdfa85a4ffea6b7cffe Intel IA-64 architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_ia64.deb Size/MD5 checksum: 395514 04207a2bfd92cd56c79a4d434f514bee HP Precision architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_hppa.deb Size/MD5 checksum: 316716 8065982ef523c653e8d25bedf716fb03 Motorola 680x0 architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_m68k.deb Size/MD5 checksum: 276388 33de460a73afad6cb44a6753ea862c27 Big endian MIPS architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mips.deb Size/MD5 checksum: 317632 d8f4dd1ea4fce2c4c48a3e096d3da12c Little endian MIPS architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mipsel.deb Size/MD5 checksum: 319404 c9a918128a56462a98049b160bfeb9d0 PowerPC architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_powerpc.deb Size/MD5 checksum: 308772 1f7300816c44924fc10b5ba6e59ff00c IBM S/390 architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_s390.deb Size/MD5 checksum: 307220 bf9b59dab82ff1bd49ce7b4a3c9f2d7f Sun Sparc architecture: http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_sparc.deb Size/MD5 checksum: 294696 503317cf10f2976dffa8d25056517925 These files will probably be moved into the stable distribution on its next update. - - --------------------------------------------------------------------------------- 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> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDSMNpW5ql+IAeqTIRAhe+AJ0YU15iLXkzRvh4BEzqk7ExiHl6yQCffZD7 19wKkfAe6Mq6/1UJTEZUOHQ= =GGrL - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBQ0m27yh9+71yA2DNAQIntAP/bE5JDR4aHYI6GdNBVBkUCWx7a8TJ29Js uzKv3F21j8DPGnV7aNNwZEhZoEnPh2PZuVYsraN/+s16bWWDXb7l0wSY3J+GiMNq LsLx69dFSz4RmnA6xAZ56IUPfh0gKQXO6x5Yd3rbFqL1pN6735Bv9p9iPqfN20hG yLjQ49p3DZg= =6u38 -----END PGP SIGNATURE-----