VDB-98263 · CVE-2017-3879 · BID 96920

Cisco NX-OS 7.0(3)I3(1)/8.3(0)CV(0.342)/8.3(0)CV(0.345) on Nexus 9000 memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

A vulnerability classified as problematic was found in Cisco NX-OS 7.0(3)I3(1)/8.3(0)CV(0.342)/8.3(0)CV(0.345) on Nexus 9000 (Router Operating System). Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

A Denial of Service vulnerability in the remote login functionality for Cisco NX-OS Software running on Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause a process used for login to terminate unexpectedly and the login attempt to fail. There is no impact to user traffic flowing through the device. The attacker could use either a Telnet or an SSH client for the remote login attempt. Affected Products: This vulnerability affects Cisco Nexus 9000 Series Switches that are running Cisco NX-OS Software and are configured to allow remote Telnet connections to the device. More Information: CSCuy25824. Known Affected Releases: 7.0(3)I3(1) 8.3(0)CV(0.342) 8.3(0)CV(0.345). Known Fixed Releases: 8.3(0)CV(0.362) 8.0(1) 7.0(3)IED5(0.19) 7.0(3)IED5(0) 7.0(3)I4(1) 7.0(3)I4(0.8) 7.0(3)I2(2e) 7.0(3)F1(1.22) 7.0(3)F1(1) 7.0(3)F1(0.230).

The bug was discovered 03/15/2017. The weakness was presented 03/17/2017 with Cisco as cisco-sa-20170315-nss1 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2017-3879 since 12/21/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/10/2020).

The vulnerability scanner Nessus provides a plugin with the ID 99372 (Cisco NX-OS Failed Authentication Handling Remote DoS (cisco-sa-20170315-nss1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316091 (Cisco Nexus 9000 Series Switches Remote Login Denial of Service Vulnerability (cisco-sa-20170315-nss1)).

Upgrading to version 8.3(0)CV(0.362), 8.0(1), 7.0(3)IED5(0.19), 7.0(3)IED5(0), 7.0(3)I4(1), 7.0(3)I4(0.8), 7.0(3)I2(2e), 7.0(3)F1(1.22), 7.0(3)F1(1) or 7.0(3)F1(0.230) eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99372). See 98262 and 98260 for similar entries.

Productinfo

Type

Router Operating System

Vendor

Cisco

Name

NX-OS

Version

License

commercial

Support

end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 99372
Nessus Name: Cisco NX-OS Failed Authentication Handling Remote DoS (cisco-sa-20170315-nss1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103402
OpenVAS Name: Cisco Nexus 9000 Series Switches Remote Login 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: NX-OS 8.3(0)CV(0.362)/8.0(1)/7.0(3)IED5(0.19)/7.0(3)IED5(0)/7.0(3)I4(1)/7.0(3)I4(0.8)/7.0(3)I2(2e)/7.0(3)F1(1.22)/7.0(3)F1(1)/7.0(3)F1(0.230)

Timelineinfo

12/21/2016 🔍
03/15/2017 +84 days 🔍
03/15/2017 +0 days 🔍
03/15/2017 +0 days 🔍
03/17/2017 +2 days 🔍
03/17/2017 +0 days 🔍
03/18/2017 +1 days 🔍
04/14/2017 +27 days 🔍
09/10/2020 +1245 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170315-nss1
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-3879 (🔍)
SecurityFocus: 96920 - Cisco NX-OS Software CVE-2017-3879 Remote Denial of Service Vulnerability
OSVDB: - CVE-2017-3879 - Cisco - NX-OS - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 03/18/2017 02:58
Updated: 09/10/2020 08:19
Changes: 03/18/2017 02:58 (76), 09/10/2020 08:19 (7)
Complete: 🔍

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