CVE-2017-6627

Vulnerability Description

A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• http://www.securityfocus.com/bid/100644Third Party AdvisoryVDB EntryBroken Link
• http://www.securitytracker.com/id/1039289Third Party AdvisoryVDB EntryBroken Link
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2MitigationVendor Advisory
• http://www.securityfocus.com/bid/100644Third Party AdvisoryVDB EntryBroken Link
• http://www.securitytracker.com/id/1039289Third Party AdvisoryVDB EntryBroken Link
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2MitigationVendor Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-US Government Resource