Published:
04 March 2003
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2003.0142 -- OpenBSD Security Advisory
Sendmail buffer overflow
04 March 2003
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AusCERT Security Bulletin Summary
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Product: Sendmail
Vendor: OpenBSD
Impact: Root Compromise
Access Required: Remote
Ref: AA-2003.01
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A buffer overflow has been found in sendmail's envelope comment
processing code which may allow an attacker to gain root privileges.
The bug was discovered by Mark Dowd of ISS X-Force.
For more information, see:
http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21950
http://www.sendmail.org/8.12.8.html
As shipped, OpenBSD runs a sendmail that binds only to localhost,
making this a localhost-only hole in the default configuration.
However, any sendmail configuration that accepts incoming mail may
potentially be exploited.
The sendmail in OpenBSD-current has been updated to version 8.12.8.
The 3.1 and 3.2 -stable branches have had a patch applied that fixes
the buffer overflow. However, because the -stable branches have
the specific vulnerability patched (as opposed to the full 8.12.8
distribution), sendmail on -stable will report the old sendmail version.
Patch for OpenBSD 3.1:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.1/common/022_sendmail.patch
Patch for OpenBSD 3.2:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.2/common/009_sendmail.patch
Patches for older versions of sendmail may be found at
ftp://ftp.sendmail.org/pub/sendmail/
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