Secuno
ENNL
Book demo

CVE-2017-3864

Cisco iOS vulnerability

8.6 HIGHEPSS 2.67%
  1. Published22 Mar 2017

Description

A vulnerability in the DHCP client implementation of Cisco IOS (12.2, 12.4, and 15.0 through 15.6) and Cisco IOS XE (3.3 through 3.7) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability occurs during the parsing of a crafted DHCP packet. An attacker could exploit this vulnerability by sending crafted DHCP packets to an affected device that is configured as a DHCP client. A successful exploit could allow the attacker to cause a reload of an affected device, resulting in a DoS condition. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS or IOS XE Software and using a specific DHCP client configuration. Cisco Bug IDs: CSCuu43892.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

Cisco iOS≥ 15.0 ≤ 15.6 · 12.2 · 12.4
Cisco iOS XE≥ 3.3 ≤ 3.7

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2022-207678.6
A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense…
CVE-2022-207158.6
A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security…
CVE-2019-152568.6
A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco…
CVE-2018-02408.6
Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco…
CVE-2016-13639.8
Buffer overflow in the redirection functionality in Cisco Wireless LAN Controller (WLC)…
CVE-2015-810410.0
The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x,…

Frequently asked

Is CVE-2017-3864 being actively exploited?

CVE-2017-3864 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.67%.

How severe is CVE-2017-3864?

CVE-2017-3864 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 2.67% probability of exploitation.

Which products are affected by CVE-2017-3864?

Affected products include Cisco iOS, Cisco iOS XE.

How do I fix CVE-2017-3864?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-3864 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.