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>> Sendmail Asynchronous Signal Handling Remote Code Execution Vulnerability
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Title : Sendmail Asynchronous Signal Handling Remote Code Execution Vulnerability
VUPEN ID : VUPEN/ADV-2006-1049
CVE ID : CVE-2006-0058
Rated as : Critical 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-03-22
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A critical vulnerability has been identified in Sendmail, which could be exploited by remote attackers or network worms to take complete control of an affected system. This flaw is due to errors in the "setjmp()", "longjmp()" and "sm_syslog()" functions that do not properly handle certain asynchronous signals, which could be exploited by remote unauthenticated attackers to execute arbitrary commands by sending specially crafted requests to the SMTP port.
Affected Products
Sendmail version 8.13.5 and prior
Sendmail version 8.12.11 and prior
Sendmail Sentrion versions 1.1
Sendmail Switch versions 2.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Switch versions 3.0.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Switch versions 3.1.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Managed MTA versions 2.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Managed MTA versions 3.0.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Managed MTA versions 3.1.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Multi-Switch versions 2.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Multi-Switch versions 3.0.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Multi-Switch versions 3.1.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Message Store/SAMS versions 1.2.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Message Store/SAMS versions 2.0.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Message Store/SAMS versions 2.1.x (Solaris, Linux, AIX, and HP-UX)
Sendmail Message Store/SAMS versions 2.2.x (Solaris, Linux, AIX, and HP-UX)
Intelligent Quarantine version 3.0 (Solaris or Linux)
Solution
Upgrade to Sendmail version 8.13.6 :
ftp://ftp.sendmail.org/pub/sendmail/
Or apply patch for Sendmail version 8.13.5 :
ftp://ftp.sendmail.org/pub/sendmail/8.13.5.p0
Or apply patch for Sendmail version 8.12.11 :
ftp://ftp.sendmail.org/pub/sendmail/8.12.11.p0
Commercial products :
http://www.sendmail.com/company/advisory/index.shtml
References
http://www.vupen.com/english/advisories/2006/1049
http://www.sendmail.com/company/advisory/index.shtml
http://www.sendmail.org/8.13.6.html
http://xforce.iss.net/xforce/alerts/id/216
Credits
Vulnerability reported by Mark Dowd
ChangeLog
2006-03-22 : Initial release
2006-03-23 : Updated Advisory
Vulnerability Management
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