Gentoo Linux Security Advisory 201206-22 - Multiple vulnerabilities have been found in Samba, the worst of which may allow execution of arbitrary code with root privileges. Versions less than 3.5.15 are affected.
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Mandriva Linux Security Advisory 2010-141 - The chain_reply function in process.c in smbd in Samba before 3.4.8 and 3.5.x before 3.5.2 allows remote attackers to cause a denial of service via a Negotiate Protocol request with a certain 0x0003 field value followed by a Session Setup AndX request with a certain 0x8003 field value. The reply_sesssetup_and_X_spnego function in sesssetup.c in smbd in Samba before 3.4.8 and 3.5.x before 3.5.2 allows remote attackers to trigger an out-of-bounds read, and cause a denial of service (process crash), via a \\xff\\xff security blob length in a Session Setup AndX request. The updated packages provides samba 3.4.8 which is not vulnerable to these issues.
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