Race condition in ZEO/StorageServer.py in Zope Object Database (ZODB) before 3.10.0a2 allows 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, a related issue to CVE-2010-3492.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-3495
• https://bugs.launchpad.net/zodb/+bug/135108
• http://bugs.python.org/issue6706
• http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html
• http://pypi.python.org/pypi/ZODB3/3.10.0#id1
• 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
• https://pypi.org/project/ZODB3/3.10.0a2/#a2-2010-05-04
• https://web.archive.org/web/20111225005929/http://secunia.com/advisories/41755
• zopefoundation/ZODB@cfe1627
• https://github.com/pypa/advisory-database/tree/main/vulns/zodb3/PYSEC-2010-27.yaml
• http://secunia.com/advisories/41755