===================================================================== CERT-Renater Note d'Information No. 2005/VULN604 _____________________________________________________________________ DATE : 10/10/2005 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running openvpn. ====================================================================== - -------------------------------------------------------------------------- Debian Security Advisory DSA 851-1 security at 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 at lists.debian.org Package info: `apt-cache show ' and http://packages.debian.org/ ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================