Some vulnerabilities have been reported in Samba, which can be exploited by malicious people to compromise a vulnerable system.
1) A boundary error exists within the "reply_netbios_packet()" function in nmbd/nmbd_packets.c when sending NetBIOS replies. This can be exploited to cause a stack-based buffer overflow by sending multiple specially crafted WINS "Name Registration" requests followed by a WINS "Name Query" request.
Successful exploitation allows execution of arbitrary code, but requires that Samba is configured to run as a WINS server (the "wins support" option is enabled).
2) A boundary error exists within the processing of GETDC logon requests. This can be exploited to cause a buffer overflow by sending specially crafted GETDC mailslot requests.
Successful exploitation of the vulnerability requires that Samba is configured as a Primary or Backup Domain Controller.
The vulnerabilities are reported in version 3.0.26a. Other versions may also be affected.
Solution: Apply patches or update to version 3.0.27.
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