The push_ascii function in smbd in Samba 3.6.x before 3.6.24, 4.0.x before 4.0.19, and 4.1.x before 4.1.9 allows remote authenticated users to cause a denial of service (memory corruption and daemon crash) via an attempt to read a Unicode pathname without specifying use of Unicode, leading to a character-set conversion failure that triggers an invalid pointer dereference.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-3493
• https://blogs.oracle.com/sunsecurity/entry/multiple_vulnerabilities_in_samba1
• https://bugzilla.redhat.com/show_bug.cgi?id=1108748
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993
• http://advisories.mageia.org/MGASA-2014-0279.html
• http://linux.oracle.com/errata/ELSA-2014-0866.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html
• http://rhn.redhat.com/errata/RHSA-2014-0866.html
• http://secunia.com/advisories/59378
• http://secunia.com/advisories/59407
• http://secunia.com/advisories/59433
• http://secunia.com/advisories/59579
• http://secunia.com/advisories/59834
• http://secunia.com/advisories/59848
• http://secunia.com/advisories/59919
• http://secunia.com/advisories/61218
• http://security.gentoo.org/glsa/glsa-201502-15.xml
• http://www.mandriva.com/security/advisories?name=MDVSA-2014:136
• http://www.mandriva.com/security/advisories?name=MDVSA-2015:082
• http://www.samba.org/samba/security/CVE-2014-3493
• http://www.securityfocus.com/archive/1/532757/100/0/threaded
• http://www.securityfocus.com/bid/68150
• http://www.securitytracker.com/id/1030455
• https://access.redhat.com/errata/RHSA-2014:0866
• https://access.redhat.com/errata/RHSA-2014:0867
• https://access.redhat.com/errata/RHSA-2014:1009
• https://access.redhat.com/security/cve/CVE-2014-3493