CVE-2010-3495

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.

Published: 2010-10-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2010-3495 is rated Moderate Risk (41.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.34%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2010-3495

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.04% 1.34% +0.30%
2 2025-03-30 1.47% 1.04% -0.43%
3 2025-03-29 1.47%

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-3495

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
8.6 2.9 [email protected]

Weakness enumeration for CVE-2010-3495

GitHub Security Advisory for CVE-2010-3495

GHSA-j6m4-frxh-p4x8 · Severity: medium · Ecosystem: pip — Zope Object Database Denial of Service vulnerability

OS Trackers for CVE-2010-3495

vendor priority summary link
ubuntu low CVE-2010-3495 low priority: Ubuntu including 1 source packages (zodb), 20 status rows across 20 suites (dapper, hardy, jaunty, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 10, not-affected 8, DNE 1, released 1. https://ubuntu.com/security/CVE-2010-3495

Affected software / configurations for CVE-2010-3495

Vendor Product Version Raw CPE
zope zodb <= 3.9.7 cpe:2.3:a:zope:zodb:*:*:*:*:*:*:*:*
zope zodb 2.8.11 cpe:2.3:a:zope:zodb:2.8.11:*:*:*:*:*:*:*
zope zodb 2.9.11 cpe:2.3:a:zope:zodb:2.9.11:*:*:*:*:*:*:*
zope zodb 2.10.9 cpe:2.3:a:zope:zodb:2.10.9:*:*:*:*:*:*:*
zope zodb 2.11.4 cpe:2.3:a:zope:zodb:2.11.4:*:*:*:*:*:*:*
zope zodb 3.1 cpe:2.3:a:zope:zodb:3.1:*:*:*:*:*:*:*
zope zodb 3.1.1 cpe:2.3:a:zope:zodb:3.1.1:*:*:*:*:*:*:*
zope zodb 3.2 cpe:2.3:a:zope:zodb:3.2:*:*:*:*:*:*:*
zope zodb 3.2.4 cpe:2.3:a:zope:zodb:3.2.4:*:*:*:*:*:*:*
zope zodb 3.3 cpe:2.3:a:zope:zodb:3.3:*:*:*:*:*:*:*
zope zodb 3.3.3 cpe:2.3:a:zope:zodb:3.3.3:*:*:*:*:*:*:*
zope zodb 3.4 cpe:2.3:a:zope:zodb:3.4:*:*:*:*:*:*:*
zope zodb 3.4.1 cpe:2.3:a:zope:zodb:3.4.1:*:*:*:*:*:*:*
zope zodb 3.5 cpe:2.3:a:zope:zodb:3.5:*:*:*:*:*:*:*
zope zodb 3.6 cpe:2.3:a:zope:zodb:3.6:*:*:*:*:*:*:*
zope zodb 3.7 cpe:2.3:a:zope:zodb:3.7:*:*:*:*:*:*:*
zope zodb 3.8 cpe:2.3:a:zope:zodb:3.8:*:*:*:*:*:*:*
zope zodb 3.8.0 cpe:2.3:a:zope:zodb:3.8.0:*:*:*:*:*:*:*
zope zodb 3.8.1 cpe:2.3:a:zope:zodb:3.8.1:*:*:*:*:*:*:*
zope zodb 3.8.2 cpe:2.3:a:zope:zodb:3.8.2:*:*:*:*:*:*:*
zope zodb 3.8.6 cpe:2.3:a:zope:zodb:3.8.6:*:*:*:*:*:*:*
zope zodb 3.9.0 cpe:2.3:a:zope:zodb:3.9.0:*:*:*:*:*:*:*
zope zodb 3.9.0b1 cpe:2.3:a:zope:zodb:3.9.0b1:*:*:*:*:*:*:*
zope zodb 3.9.0b2 cpe:2.3:a:zope:zodb:3.9.0b2:*:*:*:*:*:*:*
zope zodb 3.9.0b3 cpe:2.3:a:zope:zodb:3.9.0b3:*:*:*:*:*:*:*
zope zodb 3.9.0b4 cpe:2.3:a:zope:zodb:3.9.0b4:*:*:*:*:*:*:*
zope zodb 3.9.0b5 cpe:2.3:a:zope:zodb:3.9.0b5:*:*:*:*:*:*:*
zope zodb 3.9.0c1 cpe:2.3:a:zope:zodb:3.9.0c1:*:*:*:*:*:*:*

References for CVE-2010-3495

cvelogic Threat Intelligence