VDB-101563 · CVE-2017-6650 · BID 98528

Cisco NX-OS 7.1/7.2/7.3 on Nexus 5000 Telnet CLI command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco NX-OS 7.1/7.2/7.3 on Nexus 5000. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Telnet CLI. This manipulation causes command injection. This vulnerability appears as CVE-2017-6650. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability was found in Cisco NX-OS 7.1/7.2/7.3 on Nexus 5000 (Router Operating System). It has been declared as problematic. Affected by this vulnerability is an unknown function of the component Telnet CLI. The manipulation with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the Telnet CLI command of Cisco NX-OS System Software 7.1 through 7.3 running on Cisco Nexus 5000 Series Switches could allow an authenticated, local attacker to perform a command injection attack. The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting crafted command arguments into the Telnet CLI command. An exploit could allow the attacker to read or write arbitrary files at the user's privilege level outside of the user's path. Cisco Bug IDs: CSCvb86771.

The bug was discovered 05/17/2017. The weakness was presented 05/22/2017 as cisco-sa-20170517-nss1 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2017-6650 since 03/09/2017. Attacking locally is a requirement. The successful exploitation requires a single authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 12/25/2020). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 4 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 316120 (Cisco Nexus 5000 Series Switches Telnet CLI Command Injection Vulnerability (cisco-sa-20170517-nss1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98528†). See VDB-101562 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 103402
OpenVAS Name: Cisco Nexus 5000 Series Switches Telnet CLI Command Injection Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
05/17/2017 +69 days 🔍
05/17/2017 +0 days 🔍
05/21/2017 +4 days 🔍
05/22/2017 +1 days 🔍
05/22/2017 +0 days 🔍
12/25/2020 +1313 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170517-nss1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6650 (🔍)
GCVE (CVE): GCVE-0-2017-6650
GCVE (VulDB): GCVE-100-101563
SecurityFocus: 98528 - Multiple Cisco Products CVE-2017-6650 Local Command Injection Vulnerability
OSVDB: - CVE-2017-6650 - Cisco - Nx-Os - Medium
SecurityTracker: 1038518

See also: 🔍

Entryinfo

Created: 05/22/2017 11:11
Updated: 12/25/2020 10:44
Changes: 05/22/2017 11:11 (75), 12/25/2020 10:44 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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