# CVE-2017-6627

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.

- Page: https://www.vulneraibility.com/cve/CVE-2017-6627
- CVSS: 7.5
- Known exploited: yes, in CISA KEV since 2022-03-03; CISA due date 2022-03-24
- EPSS: 6.16% (percentile 93.6)
- CISA SSVC: exploitation active, automatable yes, technical impact partial (assessed 2025-02-04)
- Weakness: CWE-399
- Published: 2017-09-07

## Affected versions

- Cisco IOS and Cisco IOS XE: affected Cisco IOS and Cisco IOS XE

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] http://www.securityfocus.com/bid/100644
- [other] http://www.securitytracker.com/id/1039289
- [other] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.