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CVE-2017-3859

UnknownEPSS 2.48%

Last modified

CVE-2017-3859 is a vulnerability of currently unknown severity. A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. EPSS estimates a 2.48% chance of exploitation in the next 30 days.

Description

A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.

Metrics

EPSS Probability
2.48%

82.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe3.13.4s
CiscoIos Xe3.13.5as
CiscoIos Xe3.13.5s
CiscoIos Xe3.13.6as
CiscoIos Xe3.13.6s
CiscoIos Xe3.14.3s
CiscoIos Xe3.14.4s
CiscoIos Xe3.15.2s
CiscoIos Xe3.15.3s
CiscoIos Xe3.15.4s
CiscoIos Xe3.16.0cs
CiscoIos Xe3.16.0s
CiscoIos Xe3.16.1as
CiscoIos Xe3.16.1s
CiscoIos Xe3.16.2as
CiscoIos Xe3.16.2bs
CiscoIos Xe3.16.2s
CiscoIos Xe3.16.3as
CiscoIos Xe3.16.3s
CiscoIos Xe3.17.0s
CiscoIos Xe3.17.1as
CiscoIos Xe3.17.1s
CiscoIos Xe3.17.2s
CiscoIos Xe3.18.0as
CiscoIos Xe3.18.0s
CiscoIos Xe3.18.0sp
CiscoIos Xe3.18.1asp
CiscoIos Xe3.18.1bsp
CiscoIos Xe3.18.1csp
CiscoIos Xe3.18.1s
CiscoIos Xe3.18.1sp
CiscoIos Xe3.18.2s
CiscoIos Xe3.18.3vs

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-3859?
A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.
How severe is CVE-2017-3859?
Severity scoring for CVE-2017-3859 is pending analysis. The EPSS model estimates a 2.48% probability of exploitation in the next 30 days.
How do I fix CVE-2017-3859?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-3859?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST