CVE-2010-3493

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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.79% Top 30%
Vendor Advisory mandriva.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory mandriva.com Vendor Advisory python.org Vendor Advisory python.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://svn.python.org/view/python/branches/py3k/Lib/smtpd.py?r1=84289&r2=84288&pathrev=84289 patch
http://www.openwall.com/lists/oss-security/2010/09/11/2 mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=632200
http://secunia.com/advisories/43068 third party advisory
https://bugs.launchpad.net/zodb/+bug/135108
http://www.vupen.com/english/advisories/2011/0212 vdb entry
http://secunia.com/advisories/51040 third party advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12210 vdb entry signature
http://secunia.com/advisories/50858 third party advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2010:216 vendor advisory
http://bugs.python.org/issue9129 patch vendor advisory
http://www.securityfocus.com/bid/44533 vdb entry
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html vendor advisory
http://www.openwall.com/lists/oss-security/2010/09/24/3 mailing list
http://www.ubuntu.com/usn/USN-1596-1 vendor advisory
http://www.openwall.com/lists/oss-security/2010/09/22/3 mailing list
http://bugs.python.org/issue6706 patch vendor advisory
http://www.openwall.com/lists/oss-security/2010/09/09/6 mailing list
http://www.ubuntu.com/usn/USN-1613-2 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html vendor advisory
http://svn.python.org/view?view=rev&revision=84289
http://secunia.com/advisories/51024 third party advisory
http://www.ubuntu.com/usn/USN-1613-1 vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2010:215 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2010-3493?
CVE-2010-3493 has been scored as a medium severity vulnerability.
How to fix CVE-2010-3493?
To fix CVE-2010-3493, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2010-3493 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2010-3493 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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