# CVE-2010-3495: Zope Object Database Denial of Service vulnerability

Source: https://junglewise.ai/threats/cve-2010-3495-zope-object-database-denial-of-service-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2010-10-19  
License: CC BY 4.0 with a link back

CVE-2010-3495 · Severity: info · Published 2010-10-19

Race condition in ZEO/StorageServer.py in Zope Object Database (ZODB) before 3.10.0 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.

Technologies: [zodb3 (PyPI)](https://junglewise.ai/threats/technologies/zodb3). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2010-3495 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2010-3495 being exploited in the wild.

**How severe is CVE-2010-3495?** Informational severity, published 19 October 2010.

**Which products and versions are affected?** zodb3 (PyPI) ECOSYSTEM:introduced=0,fixed=3.10.0a1, ECOSYSTEM:introduced=0,fixed=3.10.0a2.

**Is there a fix for CVE-2010-3495?** Yes. zodb3 (PyPI): upgrade to 3.10.0a1, 3.10.0a2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2010-3495?** Check whether you run zodb3 (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- zodb3 (PyPI): upgrade to 3.10.0a1, 3.10.0a2 or later

  ```sh
  pip install "zodb3>=3.10.0a2"
  ```


## Affected products

- zodb3 (PyPI) ECOSYSTEM:introduced=0,fixed=3.10.0a1, ECOSYSTEM:introduced=0,fixed=3.10.0a2

## Identifiers

- CVE-2010-3495
- GHSA-j6m4-frxh-p4x8
- PYSEC-2010-27

## Related threats

- [Zope Object Database (ZODB) Arbitrary files reading and deletion](https://junglewise.ai/threats/cve-2009-2701-zope-object-database-zodb-arbitrary-files-reading-and-deletion)
- [Zope Object Database (ZODB) Authentication bypass in ZEO storage servers](https://junglewise.ai/threats/cve-2009-0669-zope-object-database-zodb-authentication-bypass-in-zeo-storage)
- [Zope Object Database (ZODB) vulnerable to arbitrary Python code execution in ZEO storage servers](https://junglewise.ai/threats/cve-2009-0668-zope-object-database-zodb-vulnerable-to-arbitrary-python-code)