It is famous on Unix and Linux systems connected to the Internet. It is freely available under the terms of the GNU General Public Licence. Exim MTA that allows an attacker to run code remotely. ALL versions of Exim MTA affected bitcoin debian install rpm overflow vulnerability i.
Meh Chang discovered a buffer overflow flaw in a utility function used in the SMTP listener of Exim, a mail transport agent. A remote attacker can take advantage of this flaw to cause a denial of service, or potentially the execution of arbitrary code via a specially crafted message. An issue was discovered in the base64d function in the SMTP listener in Exim before 4. To estimate the severity of this bug, Meh developed an exploit targeting SMTP daemon of exim. The exploitation mechanism used to achieve pre-auth remote code execution is described in the following paragraphs.
In order to leverage this one byte overflow, it is necessary to trick memory management mechanism. It is highly recommended to have basic knowledge of heap exploitation before reading this section. 1 is already released and we suggest to upgrade exim immediately. XML feed or weekly email newsletter. Your support makes a big difference:I have a small favor to ask.
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