Executive Summary

Summary
Title mailx local exploit
Informations
Name DSA-044 First vendor Publication 2001-03-13
Vendor Debian Last vendor Modification 2001-03-13
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score Not Defined Attack Range Not Defined
Cvss Impact Score Not Defined Attack Complexity Not Defined
Cvss Expoit Score Not Defined Authentication Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

The mail program (a simple tool to read and send email) as distributed with Debian GNU/Linux 2.2 has a buffer overflow in the input parsing code. Since mail is installed setgid mail by default this allowed local users to use it to gain access to mail group.

Since the mail code was never written to be secure fixing it properly would mean a large rewrite. Instead of doing this we decided to no longer install it setgid. This means that it can no longer lock your mailbox properly on systems for which you need group mail to write to the mailspool, but it will still work for sending email.

This has been fixed in mailx version 8.1.1-10.1.5. If you have suidmanager installed you can also make this manually with the following command:

suidregister /usr/bin/mail root root 0755

wget url will fetch the file for you dpkg -i file.deb will install the referenced file.

Debian GNU/Linux 2.2 alias potato

Original Source

Url : http://www.debian.org/security/2001/dsa-044

Alert History

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Date Informations
2014-02-17 11:25:23
  • Multiple Updates