Description

Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, or the getpeername function having an ENOTCONN error, a related issue to CVE-2010-3492.

References

http://bugs.python.org/issue6706

http://bugs.python.org/issue9129

http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html

http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html

http://secunia.com/advisories/43068

http://secunia.com/advisories/50858

http://secunia.com/advisories/51024

http://secunia.com/advisories/51040

http://svn.python.org/view/python/branches/py3k/Lib/smtpd.py?r1=84289&r2=84288&pathrev=84289

http://svn.python.org/view?view=rev&revision=84289

http://www.mandriva.com/security/advisories?name=MDVSA-2010:215

http://www.mandriva.com/security/advisories?name=MDVSA-2010:216

http://www.openwall.com/lists/oss-security/2010/09/09/6

http://www.openwall.com/lists/oss-security/2010/09/11/2

http://www.openwall.com/lists/oss-security/2010/09/22/3

http://www.openwall.com/lists/oss-security/2010/09/24/3

http://www.securityfocus.com/bid/44533

http://www.ubuntu.com/usn/USN-1596-1

http://www.ubuntu.com/usn/USN-1613-1

http://www.ubuntu.com/usn/USN-1613-2

http://www.vupen.com/english/advisories/2011/0212

https://bugs.launchpad.net/zodb/+bug/135108

https://bugzilla.redhat.com/show_bug.cgi?id=632200

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12210

Details

Risk Information

CVSS v2