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Home » Hacking News » Immunix IMNX-2003-7+-002-01: sendmail buffer overflow

Immunix IMNX-2003-7+-002-01: sendmail buffer overflow

by Nikola Strahija on April 2nd, 2003 Buffer overflow vulnerability has been found in all versions of Sendmail earlier than 8.12.9, which may allow remote attackers to gain root privileges.

Immunix Secured OS Security Advisory

Packages updated: sendmail
Affected products: ImmunixOS 6.2, 7.0, 7+
Bugs fixed: CAN-2003-0161
Date: Mon Mar 31 2003
Advisory ID: IMNX-2003-7+-002-01
Author: Seth Arnold

Michal Zalewski has discovered an integer signedness bug in sendmail's
address handling code. A properly constructed email address could
bypass length checks when writing to a fixed-length buffer. This bug
may be remotely exploitable for root privileges.

All buffers in the affected code are allocated on the stack, so
StackGuard should prevent exploits of this vulnerability that involve
modifying the function's return address. However, there may be other
exploit paths not using function return addresses that StackGuard may
not protect.

We suggest upgrading when possible.


Package names and locations:
Precompiled binary packages for Immunix 7+ are available at:

Immunix OS 7+ md5sums:
ce6fd9202049027bf8d0e152d2a8a7eb sendmail-8.11.6-3_imnx_5.i386.rpm
55199fbef24c4739ee368af6d29f96c6 sendmail-cf-8.11.6-3_imnx_5.i386.rpm
46b2011bba76da200e4b0625580ed9ad sendmail-doc-8.11.6-3_imnx_5.i386.rpm

GPG verification:
Our public key is available at

Ibiblio is graciously mirroring our updates, so if the links above are
slow, please try:
or one of the many mirrors available at:

ImmunixOS 6.2 is no longer officially supported.
ImmunixOS 7.0 is no longer officially supported.

Contact information:
To report vulnerabilities, please contact [email protected] WireX=20 attempts to conform to the RFP vulnerability disclosure protocol

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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see


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