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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2003.0594 -- OpenBSD Security Advisory Sendmail bug in DNS maps 26 August 2003 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: sendmail 8.12.x prior to 8.12.9 Publisher: OpenBSD Operating System: OpenBSD 3.2 Linux UNIX Impact: Reduced Security - --------------------------BEGIN INCLUDED TEXT-------------------- There is a potential problem in the sendmail 8.12 series with respect to DNS maps in sendmail 8.12.8 and earlier sendmail 8.12.x versions. The bug did not exist in versions before 8.12 as the DNS map type is new to 8.12. The bug was fixed in 8.12.9, released March 29, 2003 but not labeled as a security fix as it wasn't believed to be a security bug at the time. Note that only FEATURE(`enhdnsbl') uses a DNS map. We do not have an assessment whether this problem is exploitable but we want to inform you just in case you distribute sendmail 8.12.x versions before 8.12.9. OpenBSD 3.2 shipped with sendmail 8.12.8 and thus has the bug. OpenBSD 3.3 shipped with sendmail 8.12.9 and does *not* have the bug. The problem has been fixed in the OpenBSD 3.2-stable branch. In addition, a patch is available for OpenBSD 3.2: ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.2/common/016_sendmail.patch Please note that this only affects sendmail configurations that use the "enhdnsbl" feature. The default OpenBSD sendmail config does *not* use this. Unless you have created a custom config that uses enhdnsbl, you do not need to apply the patch or update sendmail. - --------------------------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 iQCVAwUBP0q27Sh9+71yA2DNAQGKrAP/Qid/31RzVOM4XVX007SubFTrfyAVmzI1 FU0zpYow/AJ83UL9TMRMBwpUkzsexPKWJ7lNPTdhtHUKGTayHDR7we4cNZJ6RHW/ zczmqm0dtUYKPZw4xc5MSXeiziFqEeMnjh93XkiRZ2mmIHUnU4sH3dJTaJJiACM1 7Auh599PmNM= =YS6n -----END PGP SIGNATURE-----