The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method.
Open Enterprise Server openSUSE 11.2 openSUSE 11.3 openSUSE 11.4 SUSE CORE 9 for AMD64 and Intel EM64T SUSE Linux Enterprise Desktop 10 SP4 for AMD64 and Intel EM64T SUSE Linux Enterprise Desktop 10 SP4 for x86 SUSE Linux Enterprise Desktop 11 SP1 SUSE Linux Enterprise SDK 10 SP3 SUSE Linux Enterprise Server 10 SP2 for AMD64 and Intel EM64T SUSE Linux Enterprise Server 10 SP2 for IBM zSeries 64bit SUSE Linux Enterprise Server 10 SP2 for x86 SUSE Linux Enterprise Server 10 SP3 SUSE Linux Enterprise Server 10 SP4 for AMD64 and Intel EM64T SUSE Linux Enterprise Server 10 SP4 for IBM POWER SUSE Linux Enterprise Server 10 SP4 for IBM zSeries 64bit SUSE Linux Enterprise Server 10 SP4 for IPF SUSE Linux Enterprise Server 10 SP4 for x86 SUSE Linux Enterprise Server 11 SP1 SUSE Linux Enterprise Server 11 SP1 for VMware SUSE Linux Enterprise Server 11 SP1-TERADATA SUSE Linux Enterprise Server for SAP 10 SP3 SUSE Linux Enterprise Server for SAP Applications 11 SP1-TERADATA SUSE Linux Enterprise Software Development Kit 11 SP1 SUSE Linux Enterprise Teradata 10 SP3 for AMD64 and Intel EM64T