CVE-2017-3878 : A Denial of Service vulnerability in the Telnet remote login functionality of Ci

A Denial of Service vulnerability in the Telnet remote login functionality of Cisco NX-OS Software running on Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause a Telnet process used for login to terminate unexpectedly and the login attempt to fail. There is no impact to user traffic flowing through the device. 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: CSCux46778. Known Affected Releases: 7.0(3)I3(0.170). Known Fixed Releases: 7.0(3)I3(1) 7.0(3)I3(0.257) 7.0(3)I3(0.255) 7.0(3)I2(2e) 7.0(3)F1(1.22) 7.0(3)F1(1).

Published 2017-03-17 22:59:01

Updated 2017-07-12 01:29:17

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: OverflowDenial of service

Products affected by CVE-2017-3878

Cisco » Nx-os » Version: 7.0(3)i3(0.170)
cpe:2.3:o:cisco:nx-os:7.0\(3\)i3\(0.170\):*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Nexus 92160yc Switch » Version: N/A
When used together with: Cisco » Nexus 92300yc Switch » Version: N/A
When used together with: Cisco » Nexus 92304qc Switch » Version: N/A
When used together with: Cisco » Nexus 9236c Switch » Version: N/A
When used together with: Cisco » Nexus 9272q Switch » Version: N/A
When used together with: Cisco » Nexus 93108tc-ex Switch » Version: N/A
When used together with: Cisco » Nexus 93120tx Switch » Version: N/A
When used together with: Cisco » Nexus 93128tx Switch » Version: N/A
When used together with: Cisco » Nexus 93180lc-ex Switch » Version: N/A
When used together with: Cisco » Nexus 93180yc-ex Switch » Version: N/A
When used together with: Cisco » Nexus 9332pq Switch » Version: N/A
When used together with: Cisco » Nexus 9336pq Aci Spine Switch » Version: N/A
When used together with: Cisco » Nexus 9372px-e Switch » Version: N/A
When used together with: Cisco » Nexus 9372px Switch » Version: N/A
When used together with: Cisco » Nexus 9372tx-e Switch » Version: N/A
When used together with: Cisco » Nexus 9372tx Switch » Version: N/A
When used together with: Cisco » Nexus 9396px Switch » Version: N/A
When used together with: Cisco » Nexus 9396tx Switch » Version: N/A
When used together with: Cisco » Nexus 9508 Switch » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2017-3878

EPSS FAQ

0.87%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 73 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-3878

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.3	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: Low

CWE ids for CVE-2017-3878

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-3878

http://www.securitytracker.com/id/1038047

Cisco Nexus 9000 Series Packet Validation Flaw Lets Remote Users Cause the Target Telnet Service to Crash - SecurityTracker
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nss

Cisco Nexus 9000 Series Switches Telnet Login Denial of Service Vulnerability
Vendor Advisory
http://www.securityfocus.com/bid/96927

Cisco NX-OS Software CVE-2017-3878 Remote Denial of Service Vulnerability
Third Party Advisory;VDB Entry

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Vulnerability Details : CVE-2017-3878

Products affected by CVE-2017-3878

Exploit prediction scoring system (EPSS) score for CVE-2017-3878

CVSS scores for CVE-2017-3878

CWE ids for CVE-2017-3878

References for CVE-2017-3878