CVE-2017-6627: Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability
First published: Thu Sep 07 2017(Updated: )
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.
Credit: ykramarz@cisco.com psirt@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE Software | ||
| 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 | |
| Cisco IOS XE | =3.16.6s | |
| Cisco IOS XE | =3.17.0s | |
| Cisco IOS XE | =3.17.1as | |
| Cisco IOS XE | =3.17.1s | |
| Cisco IOS XE | =3.17.3s | |
| Cisco IOS XE | =3.18.0as | |
| Cisco IOS XE | =3.18.0s | |
| Cisco IOS XE | =3.18.1s | |
| Cisco IOS XE | =3.18.2s | |
| Cisco IOS XE | =3.18.3s | |
| Cisco IOS XE | =3.18.3vs | |
| Cisco IOS XE |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2017-6627?
CVE-2017-6627 is rated as high severity due to its potential for causing denial of service (DoS) conditions.
How do I fix CVE-2017-6627?
To fix CVE-2017-6627, upgrade Cisco IOS or IOS XE software to a version that addresses the vulnerability.
Which Cisco software versions are affected by CVE-2017-6627?
CVE-2017-6627 affects Cisco IOS versions 15.1, 15.2, and 15.4 as well as IOS XE versions 3.14 to 3.18.
Can CVE-2017-6627 be exploited remotely?
Yes, CVE-2017-6627 can be exploited by unauthenticated remote attackers.
What impact does CVE-2017-6627 have on affected systems?
CVE-2017-6627 can cause the input queue of an affected system to hold UDP packets, leading to a denial of service.
- agent/type
- agent/weakness
- agent/description
- agent/title
- agent/severity
- agent/references
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/source
- agent/first-publish-date
- agent/last-modified-date
- agent/event
- exploited/true
- collector/cisa-known-exploited
- source/CISA
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/tags
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- collector/nvd-api
- collector/nvd-index
- vendor/cisco
- canonical/cisco ios xe software
- canonical/cisco ios
- version/cisco ios/15.1\(2\)gc
- version/cisco ios/15.1\(2\)gc1
- version/cisco ios/15.1\(2\)gc2
- version/cisco ios/15.1\(4\)gc
- version/cisco ios/15.1\(4\)gc1
- version/cisco ios/15.1\(4\)gc2
- version/cisco ios/15.2\(1\)gc
- version/cisco ios/15.2\(1\)gc1
- version/cisco ios/15.2\(1\)gc2
- version/cisco ios/15.2\(2\)gc
- version/cisco ios/15.2\(3\)gc
- version/cisco ios/15.2\(3\)gc1
- version/cisco ios/15.2\(3r\)gca
- version/cisco ios/15.2\(4\)gc
- version/cisco ios/15.2\(4\)gc1
- version/cisco ios/15.2\(4\)gc2
- version/cisco ios/15.2\(4\)gc3
- version/cisco ios/15.4\(1\)t
- version/cisco ios/15.4\(1\)t1
- version/cisco ios/15.4\(1\)t2
- version/cisco ios/15.4\(1\)t3
- version/cisco ios/15.4\(1\)t4
- version/cisco ios/15.4\(2\)t
- version/cisco ios/15.4\(2\)t1
- version/cisco ios/15.4\(2\)t2
- version/cisco ios/15.4\(3\)m
- version/cisco ios/15.4\(3\)m1
- version/cisco ios/15.4\(3\)m2
- version/cisco ios/15.4\(3\)m2.2
- version/cisco ios/15.4\(3\)m3
- version/cisco ios/15.4\(3\)m4
- version/cisco ios/15.4\(3\)m5
- version/cisco ios/15.4\(3\)m6
- version/cisco ios/15.4\(3\)m6a
- version/cisco ios/15.4\(3\)m7
- canonical/cisco ios xe
- version/cisco ios xe/3.14.0s
- version/cisco ios xe/3.14.1s
- version/cisco ios xe/3.14.2s
- version/cisco ios xe/3.14.3s
- version/cisco ios xe/3.14.4s
- version/cisco ios xe/3.15.0s
- version/cisco ios xe/3.15.1cs
- version/cisco ios xe/3.15.1s
- version/cisco ios xe/3.15.2s
- version/cisco ios xe/3.15.3s
- version/cisco ios xe/3.15.4s
- version/cisco ios xe/3.16.0cs
- version/cisco ios xe/3.16.0s
- version/cisco ios xe/3.16.1as
- version/cisco ios xe/3.16.1s
- version/cisco ios xe/3.16.2as
- version/cisco ios xe/3.16.2bs
- version/cisco ios xe/3.16.2s
- version/cisco ios xe/3.16.3as
- version/cisco ios xe/3.16.3s
- version/cisco ios xe/3.16.4as
- version/cisco ios xe/3.16.4bs
- version/cisco ios xe/3.16.4ds
- version/cisco ios xe/3.16.4s
- version/cisco ios xe/3.16.5s
- version/cisco ios xe/3.16.6s
- version/cisco ios xe/3.17.0s
- version/cisco ios xe/3.17.1as
- version/cisco ios xe/3.17.1s
- version/cisco ios xe/3.17.3s
- version/cisco ios xe/3.18.0as
- version/cisco ios xe/3.18.0s
- version/cisco ios xe/3.18.1s
- version/cisco ios xe/3.18.2s
- version/cisco ios xe/3.18.3s
- version/cisco ios xe/3.18.3vs