Is QMail also affected by the Send Mail Bug

["Andrew D. Bartels" <andrewb () hopkinsmedical net>]

I was wondering if the Sendmail vulnerability also affects QMail.

Thanks

Andrew





Security Advisory - RHSA-2003:073-06
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Summary:
Updated sendmail packages fix critical security issues

Updated Sendmail packages are available to fix a vulnerability that may
allow remote attackers to gain root privileges by sending a carefully
crafted message.

These packages also fix a security bug if sendmail is configured to use
smrsh.

Description:
Sendmail is a widely used Mail Transport Agent (MTA) which is included
in all Red Hat Linux distributions.

During a code audit of Sendmail by ISS, a critical vulnerability was
uncovered that affects unpatched versions of Sendmail prior to version
8.12.8.  A remote attacker can send a carefully crafted email message
which, when processed by sendmail, causes arbitrary code to be executed
as root.

We are advised that a proof-of-concept exploit is known to exist, but is
not believed to be in the wild.

Since this is a message-based vulnerability, MTAs other than Sendmail
may pass on the carefully crafted message.  This means that unpatched
versions of Sendmail inside a network could still be at risk even if
they do not accept external connections directly.

In addition, the restricted shell (SMRSH) in Sendmail  allows attackers
to bypass the intended restrictions of smrsh by inserting additional
commands after "||" sequences or "/" characters, which are not properly
filtered or verified.  A sucessful attack would allow an attacker who
has a local account on a system which has explicitly enabled smrsh to
execute arbitrary binaries as themselves by utilizing their .forward
file. 

All users are advised to update to these erratum packages.  For Red Hat
Linux 8.0 we have included Sendmail version 8.12.8 which is not
vulnerable to these issues.  For all other distributions we have
included a backported patch which corrects these vulnerabilities.

Red Hat would like to thank Eric Allman for his assistance with this
vulnerability.

References:
http://www.cert.org/advisories/CA-2003-07.html
http://marc.theaimsgroup.com/?l=bugtraq&m=103350914307274
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