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[ GLSA 200911-03 ] UW IMAP toolkit: Multiple vulnerabilities
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PostPosted: Wed Nov 25, 2009 2:26 pm    Post subject: [ GLSA 200911-03 ] UW IMAP toolkit: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: UW IMAP toolkit: Multiple vulnerabilities (GLSA 200911-03)
Severity: high
Exploitable: remote
Date: November 25, 2009
Bug(s): #245425, #252567
ID: 200911-03

Synopsis


Multiple vulnerabilities have been found in the UW IMAP toolkit and the
c-client library, the worst of which leading to the execution of arbitrary
code.


Background


The UW IMAP toolkit is a daemon for the IMAP and POP3 network mail
protocols. The c-client library provides an API for IMAP, POP3 and
other protocols.


Affected Packages

Package: net-libs/c-client
Vulnerable: < 2007e
Unaffected: >= 2007e
Architectures: All supported architectures

Package: net-mail/uw-imap
Vulnerable: < 2007e
Unaffected: >= 2007e
Architectures: All supported architectures


Description


Multiple vulnerabilities were found in the UW IMAP toolkit:
  • Aron Andersson and Jan Sahlin of Bitsec reported boundary errors in
    the "tmail" and "dmail" utilities when processing overly long mailbox
    names, leading to stack-based buffer overflows (CVE-2008-5005).
  • An error in smtp.c in the c-client library was found, leading to a
    NULL pointer dereference vulnerability (CVE-2008-5006).
  • Ludwig
    Nussel reported an off-by-one error in the rfc822_output_char()
    function in the RFC822BUFFER routines in the c-client library, as used
    by the UW IMAP toolkit (CVE-2008-5514).


Impact


A remote attacker could send an e-mail to a destination mailbox name
composed of a username and '+' character followed by a long string,
possibly leading to the execution of arbitrary code. A local attacker
could gain privileges by specifying a long folder extension argument to
the tmail or dmail program. Furthermore, a remote attacker could send a
specially crafted mail message to the UW IMAP toolkit or another daemon
using the c-client library, leading to a Denial of Service. A remote
SMTP server could respond to the QUIT command with a close of the TCP
connection instead of the expected 221 response code, possibly leading
to a Denial of Service.


Workaround


There is no known workaround at this time.


Resolution


All c-client library users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/c-client-2007e"

All UW IMAP toolkit users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/uw-imap-2007e"


References

CVE-2008-5005
CVE-2008-5006
CVE-2008-5514
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