Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0667 -- Debian Security Advisory DSA-389-1 New ipmasq packages fix insecure packet filtering rules 22 September 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ipmasq Publisher: Debian Operating System: Debian GNU/Linux 3.0 Linux Impact: Reduced Security Access Required: Remote CVE Names: CAN-2003-0785 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - -------------------------------------------------------------------------- Debian Security Advisory DSA 389-1 security@debian.org http://www.debian.org/security/ Matt Zimmerman September 20th, 2003 http://www.debian.org/security/faq - - -------------------------------------------------------------------------- Package : ipmasq Vulnerability : insecure packet filtering rules Problem-Type : remote Debian-specific: no CVE Ids : CAN-2003-0785 ipmasq is a package which simplifies configuration of Linux IP masquerading, a form of network address translation which allows a number of hosts to share a single public IP address. Due to use of certain improper filtering rules, traffic arriving on the external interface addressed for an internal host would be forwarded, regardless of whether it was associated with an established connection. This vulnerability could be exploited by an attacker capable of forwarding IP traffic with an arbitrary destination address to the external interface of a system with ipmasq installed. For the current stable distribution (woody) this problem has been fixed in version 3.5.10c. For the unstable distribution (sid) this problem has been fixed in version 3.5.12. We recommend that you update your ipmasq 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 3.0 alias woody - - -------------------------------- Source archives: http://security.debian.org/pool/updates/main/i/ipmasq/ipmasq_3.5.10c.dsc Size/MD5 checksum: 502 f5f259d819d47b687c3da42d931b1404 http://security.debian.org/pool/updates/main/i/ipmasq/ipmasq_3.5.10c.tar.gz Size/MD5 checksum: 30656 e9a9a1f86bd88dcceaeba900698165bb Architecture independent components: http://security.debian.org/pool/updates/main/i/ipmasq/ipmasq_3.5.10c_all.deb Size/MD5 checksum: 47748 199a747d5c48c145cf34772f26cbba4d These files will probably be moved into the stable distribution on its next revision. - - --------------------------------------------------------------------------------- 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 v1.2.3 (GNU/Linux) iD8DBQE/bM7qArxCt0PiXR4RArtIAJ9HhBf5J7Om4cU7hBwxRYUvJJ1mywCg10nu tzhzzArT1gq7C2Um9L0yljY= =4/vt - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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 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 iQCVAwUBP25b9Sh9+71yA2DNAQH+DgP9F3qdHj6Fuc3URyhGHQWT0LhFt+z4aDa+ xZ2iYkpLP5vB7y+DVZg8e7TVNMsYL8mlhHl6euqN/aqZh1fIm+3lo9lQYyTLpV1c JCf6p6hSje94TahZMOlfzg4Mj5k2Y0hDNUbbN8Ks25LP2EKfpGfDQTsYzo0txAke zC7xewTZv/I= =Kuy/ -----END PGP SIGNATURE-----