Cisco IOS 15.2(2)E3/15.2(4)E1 Forwarding Queue resource management

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Cisco IOS 15.2(2)E3/15.2(4)E1. Affected by this vulnerability is an unknown functionality of the component Forwarding Queue. Performing a manipulation results in resource management. This vulnerability is reported as CVE-2017-3803. The attacker must have access to the local network to execute the attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS 15.2(2)E3/15.2(4)E1 (Router Operating System). This affects some unknown processing of the component Forwarding Queue. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the Cisco IOS Software forwarding queue of Cisco 2960X and 3750X switches could allow an unauthenticated, adjacent attacker to cause a memory leak in the software forwarding queue that would eventually lead to a partial denial of service (DoS) condition. More Information: CSCva72252. Known Affected Releases: 15.2(2)E3 15.2(4)E1. Known Fixed Releases: 15.2(2)E6 15.2(4)E3 15.2(5)E1 15.2(5.3.28i)E1 15.2(6.0.49i)E 3.9(1)E.

The bug was discovered 01/18/2017. The weakness was disclosed 01/26/2017 with Cisco as CSCva72252 as confirmed advisory (Website). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2017-3803 since 12/21/2016. Access to the local network is required for this attack to succeed. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 8 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 316067 (Cisco IOS IPv6 Denial of Service Vulnerability (cisco-sa-20170118-catalyst)).

Upgrading to version 15.2(2)E6, 15.2(4)E3, 15.2(5)E1, 15.2(5.3.28i)E1, 15.2(6.0.49i)E or 3.9(1)E eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 95632†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103403
OpenVAS Name: Cisco IOS for Catalyst 2960X and 3750X Switches Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: IOS 15.2(2)E6/15.2(4)E3/15.2(5)E1/15.2(5.3.28i)E1/15.2(6.0.49i)E/3.9(1)E

Timelineinfo

12/21/2016 🔍
01/18/2017 +28 days 🔍
01/18/2017 +0 days 🔍
01/26/2017 +8 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
05/14/2026 +3395 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCva72252⛔
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-3803 (🔍)
GCVE (CVE): GCVE-0-2017-3803
GCVE (VulDB): GCVE-100-95997

OVAL: 🔍

SecurityFocus: 95632 - Cisco Catalyst 2960 and 3750 Series Switches CVE-2017-3803 Denial of Service Vulnerability
OSVDB: - CVE-2017-3803 - Cisco - IOS - Denial of Service Issue
SecurityTracker: 1037657

Entryinfo

Created: 01/26/2017 14:58
Updated: 05/14/2026 22:27
Changes: 01/26/2017 14:58 (68), 08/02/2020 09:38 (7), 11/04/2022 08:46 (3), 08/28/2024 18:25 (16), 05/14/2026 22:27 (1)
Complete: 🔍
Cache ID: 216::103

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