VDB-106232 · CVE-2017-6627 · BID 100644

Cisco IOS/IOS XE UDP resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Cisco IOS and IOS XE. Impacted is an unknown function of the component UDP Handler. Such manipulation leads to resource management. This vulnerability is uniquely identified as CVE-2017-6627. The attack can be launched remotely. Moreover, an exploit is present. Restrictive firewalling should be applied.

Detailsinfo

A vulnerability was found in Cisco IOS and IOS XE (Router Operating System) (version unknown) and classified as problematic. Affected by this issue is an unknown function of the component UDP Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

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.

The bug was discovered 09/06/2017. The weakness was disclosed 09/07/2017 with Cisco as cisco-sa-20170906-ios-udp as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2017-6627 since 03/09/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but an exploit is available.

It is declared as attacked. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316138 (Cisco IOS and IOS XE Software UDP Packet Processing Denial of Service Vulnerability (cisco-sa-20170906-ios-udp)). This issue was added on 03/03/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 03/24/2022:

Apply updates per vendor instructions.

Addressing this vulnerability is possible by firewalling udp.

The vulnerability is also documented in the databases at SecurityFocus (BID 100644†) and SecurityTracker (ID 1039289†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Timelineinfo

03/09/2017 🔍
09/06/2017 +181 days 🔍
09/06/2017 +0 days 🔍
09/07/2017 +1 days 🔍
09/07/2017 +0 days 🔍
09/07/2017 +0 days 🔍
09/08/2017 +1 days 🔍
02/05/2025 +2707 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170906-ios-udp
Researcher: Cisco.
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6627 (🔍)
GCVE (CVE): GCVE-0-2017-6627
GCVE (VulDB): GCVE-100-106232

OVAL: 🔍

SecurityFocus: 100644 - Cisco IOS and Cisco IOS XE CVE-2017-6627 Denial of Service Vulnerability
SecurityTracker: 1039289

scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/08/2017 12:03
Updated: 02/05/2025 01:01
Changes: 09/08/2017 12:03 (63), 11/14/2019 13:53 (11), 01/11/2021 10:00 (2), 04/23/2024 13:28 (27), 09/09/2024 22:29 (1), 01/27/2025 21:51 (1), 02/05/2025 01:01 (11)
Complete: 🔍
Cache ID: 216::103

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