16 February 2006
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0136 -- [Win][UNIX/Linux] Honeyd Remote Detection Via Multiple Probe Packets 16 February 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: honeyd prior to 1.5 Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact: Reduced Security Access: Remote/Unauthenticated Original Bulletin: http://www.honeyd.org/adv.2006-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Honeyd Security Advisory 2006-001 ================================= Topic: Remote Detection Via Multiple Probe Packets Version: All versions prior to Honeyd 1.5 Severity: Identification of Honeyd installations allows an adversary to launch attacks specifically against Honeyd. No remote root exploit is currently known. Details: ========= Honeyd is a virtual honeypot daemon that can simulate virtual hosts on unallocated IP addresses. A bug in the IP reassembly codes causes Honeyd to reply to illegal fragments that other implementations would silently drop. Watching for replies, it is possible to detect IP addresses simulated by Honeyd. Solutions: ========== A new version of Honeyd has been released to address this issue. The source code for Honeyd 1.5 can downloaded from http://www.citi.umich.edu/u/provos/honeyd/ It is suggested to run Honeyd in a chroot environment under a sandbox like Systrace. Existing installations can be fixed with the following patch http://www.honeyd.org/adv.2006-01.patch Thanks To ========= Jon Oberheide for finding the problem and providing a fix to avoid detection. More Information: ================= More information on Honeyd can be found at http://www.honeyd.org/ - --------------------------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 firstname.lastname@example.org and we will forward your request to the appropriate person. NOTE: Third Party Rights 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 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: email@example.com 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 iQCVAwUBQ/QhLyh9+71yA2DNAQK9sAP/bnrSVXu82l1REVN2qHaUHnU9qoH25xHF wpmUvl99CRlQAdm0t6y1YyJTXDSHjBTRpVsDDfh6hZnHuIjHEwSt2d8UzhPkWIih 49OH2wbPeTNsg+Y7GSLNjE5Gku1n71VzgGdd7tl8UVccGnXEqTXcU/yfVCczzXgL 2xK9zIJPYQg= =CzV5 -----END PGP SIGNATURE-----