CVEvulnerability

CVE-2017-6627

7.5 HIGH Known exploited Published 2017-09-07 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability — Cisco IOS and IOS XE Software

A vulnerability in the UDP processing code of Cisco IOS and IOS XE 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 denial of service.

Added to KEV
2022-03-03
Remediation due
2022-03-24
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2017-6627
Status
Analyzed
Published
2017-09-07
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-399, CWE-404

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.

Affected configurations

• cisco ios 15.1\(2\)gc • cisco ios 15.1\(2\)gc1 • cisco ios 15.1\(2\)gc2 • cisco ios 15.1\(4\)gc • cisco ios 15.1\(4\)gc1 • cisco ios 15.1\(4\)gc2 • cisco ios 15.2\(1\)gc • cisco ios 15.2\(1\)gc1 • cisco ios 15.2\(1\)gc2 • cisco ios 15.2\(2\)gc • cisco ios 15.2\(3\)gc • cisco ios 15.2\(3\)gc1 • cisco ios 15.2\(3r\)gca • cisco ios 15.2\(4\)gc • cisco ios 15.2\(4\)gc1 • cisco ios 15.2\(4\)gc2 • cisco ios 15.2\(4\)gc3 • cisco ios 15.4\(1\)t • cisco ios 15.4\(1\)t1 • cisco ios 15.4\(1\)t2 • cisco ios 15.4\(1\)t3 • cisco ios 15.4\(1\)t4 • cisco ios 15.4\(2\)t • cisco ios 15.4\(2\)t1 • cisco ios 15.4\(2\)t2 • cisco ios 15.4\(3\)m • cisco ios 15.4\(3\)m1 • cisco ios 15.4\(3\)m2 • cisco ios 15.4\(3\)m2.2 • cisco ios 15.4\(3\)m3 • cisco ios 15.4\(3\)m4 • cisco ios 15.4\(3\)m5 • cisco ios 15.4\(3\)m6 • cisco ios 15.4\(3\)m6a • cisco ios 15.4\(3\)m7 • cisco ios xe 3.14.0s • cisco ios xe 3.14.1s • cisco ios xe 3.14.2s • cisco ios xe 3.14.3s • cisco ios xe 3.14.4s • cisco ios xe 3.15.0s • cisco ios xe 3.15.1cs • cisco ios xe 3.15.1s • cisco ios xe 3.15.2s • cisco ios xe 3.15.3s • cisco ios xe 3.15.4s • cisco ios xe 3.16.0cs • cisco ios xe 3.16.0s • cisco ios xe 3.16.1as • cisco ios xe 3.16.1s • cisco ios xe 3.16.2as • cisco ios xe 3.16.2bs • cisco ios xe 3.16.2s • cisco ios xe 3.16.3as • cisco ios xe 3.16.3s • cisco ios xe 3.16.4as • cisco ios xe 3.16.4bs • cisco ios xe 3.16.4ds • cisco ios xe 3.16.4s • cisco ios xe 3.16.5s … and 11 more

Related

Weakness · not in database (1)

Weakness · CWE (1)

  • CWE-404 Improper Resource Shutdown or Release weakness

References