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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT Security Bulletin ASB-2014.0032 A number of vulnerabilities have been identified in Samba. 19 March 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Samba Operating System: UNIX variants (UNIX, Linux, OSX) Impact/Access: Access Confidential Data -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-6442 CVE-2013-4496 Member content until: Friday, April 18 2014 OVERVIEW A number of vulnerabilities have been identified in Samba prior to 3.6.23, 4.0.16, and 4.1.6. [1, 2] IMPACT The vendor has provided the following details regarding these vulnerabilities: CVE-2013-4496: "Samba versions 3.4.0 and above allow the administrator to implement locking out Samba accounts after a number of bad password attempts. However, all released versions of Samba did not implement this check for password changes, such as are available over multiple SAMR and RAP interfaces, allowing password guessing attacks. As this was found during an internal audit of the Samba code there are no currently known exploits for this problem (as of March 11th 2014)." [1] CVE-2013-6442: "Samba versions 4.0.0 and above have a flaw in the smbcacls command. If smbcacls is used with the "-C|--chown name" or "-G|--chgrp name" command options it will remove the existing ACL on the object being modified, leaving the file or directory unprotected." [2] MITIGATION The vendor recommends updating Samba to correct these issues. [1, 2] REFERENCES [1] Subject: CVE-2013-4496: Password lockout not enforced for SAMR password changes http://www.samba.org/samba/security/CVE-2013-4496 [2] Subject: smbcacls will remove the ACL on a file or directory when changing owner or group owner. http://www.samba.org/samba/security/CVE-2013-6442 AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. 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. =========================================================================== 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 iQIVAwUBUykxExLndAQH1ShLAQKPpQ/+LPJft6PjPz8K5d0Fw1s0HgzIMR0Snp0c iZVB/w9TddiEO5wi1emWlPXMST1hLFN6Kba6OLmJ8DnFbkkQVJHCmKrw121uXn0b RzeyZQfYS+74rMSLacx/wao+8+CTPb3lLVQlHtvphZ+YABhnT4F41s6VzRMdNwwP VYPiGNgyU1ZrbjphYr8jk5GzSTpQ3rPLfPpXynVlvjLpf60/ybFuGK1D4rMjldAb 5jj5F+J/FhrC8n9ljZc3FA7Gcwh4dws8XBxHCEV/UAbziEL4iOMzmx4Y0o2dF9wr VDgd5DGuRnEx7bGaXt0Doue2h/kK7m+l9B8G8txbR6YYSjQTCysBGUHSZefDX8rJ NY4WrQm71uK8uGd1mVOl9NQSl5OfFWGx22oh/TB/CGkY6RMvLMlXmcixkmre8CcQ omiEreEHfdqCyy5vmzmUr4cuuALWeAOfWojI2CuzNB2zXVq6qxH1aD83NP6OUpqe SRalubVZHeMtbi+p8trAaQ70u2kq6oOig2xvo13+9H2MRLkByUEJ2q0GxjM01eq/ +TWDzWTe/xgF77b7HPSgls9gYFex9WsYaFKJIZiljaGxd/ARlLAb9pqL1G+HaI04 fNiAk3XJOfc7mQaNOHQkaI+GvKPFsdAglt7XchpQKpGynMqQdY5zpdYXLLhW7f3O VUJ+gli3Lcc= =Z/ps -----END PGP SIGNATURE-----