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CVE-2017-13704

In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to ...

Published: Oct 2, 2017Updated: May 13, 2026 Sources: CVE List NVD BDU csafCWE-20
NVD MITRE
7.5CVSSHIGH
EPSS Score
65.4%
Top 0.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-20

Affected Products

DnsmasqSimon Kelley
On-prem
Networking Infrastructure / dns-dhcp-ntp
OWL 3GBelden Inc.Networking Infrastructure
OWL LTEBelden Inc.Networking Infrastructure
OWL LTE M12Belden Inc.Networking Infrastructure
SCALANCE W1750DSiemens AGICS / OT / IoT
simon kelleyindividual-devNetworking Infrastructure
belden inc.commercialUSNetworking Infrastructureaka belden
siemens agcommercialDEEnterprise Softwareaka siemens
and 12 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://access.redhat.com/security/cve/cve-2017-13704
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=1495510
bugzilla.redhat.com
https://www.belden.com/hubfs/support/security/bulletins/Belden_Security_Bulletin_BSECV-2020-04_1v0.pdf?hsLang=en
belden.com
and 26 more references View all →

Timeline

Published
Oct 2, 2017
Last Updated
May 13, 2026

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