CVE-2017-6662 Vulnerability Analysis & Exploit Details

CVE-2017-6662
Vulnerability Scoring

8.0
/10
Very High Risk

Highly exploitable, CVE-2017-6662 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2017-6662 Details

Status: Deferred

Last updated: 🕜 20 Apr 2025, 01:37 UTC
Originally published on: 🕖 26 Jun 2017, 07:29 UTC

Time between publication and last update: 2854 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVE-2017-6662 Vulnerability Summary

CVE-2017-6662: A vulnerability in the web-based user interface of Cisco Prime Infrastructure (PI) and Evolved Programmable Network Manager (EPNM) could allow an authenticated, remote attacker read and write access to information stored in the affected system as well as perform remote code execution. The attacker must have valid user credentials. The vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing an XML file. An attacker could exploit this vulnerability by convincing the administrator of an affected system to import a crafted XML file with malicious entries which could allow the attacker to read and write files and execute remote code within the application, aka XML Injection. Cisco Prime Infrastructure software releases 1.1 through 3.1.6 are vulnerable. Cisco EPNM software releases 1.2, 2.0, and 2.1 are vulnerable. Cisco Bug IDs: CSCvc23894 CSCvc49561.

Assessing the Risk of CVE-2017-6662

Access Complexity Graph

The exploitability of CVE-2017-6662 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2017-6662

CVE-2017-6662 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2017-6662, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2017-6662, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2017-6662 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2017-6662 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2017-6662 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 1.418% (probability of exploit)

EPSS Percentile: 86.66% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 13.340000000000003% of others.

CVE-2017-6662 References

External References

CWE Common Weakness Enumeration

CWE-611

CAPEC Common Attack Pattern Enumeration and Classification

  • Data Serialization External Entities Blowup CAPEC-221 This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

Vulnerable Configurations

  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.200:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.200:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.300:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.300:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.400:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.400:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.500:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:1.2.500:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:2.0\(4.0.45d\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:2.0\(4.0.45d\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:evolved_programmable_network_manager:2.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:evolved_programmable_network_manager:2.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.2.0.103:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.2.0.103:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.3:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.3.0.20:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.3.0.20:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.4:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.4.0.45:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.4.0.45:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:1.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:1.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:2.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:2.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:2.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:2.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:2.2\(2\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:2.2\(2\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:2.2\(3\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:2.2\(3\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.1\(0.128\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.1\(0.128\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.1\(4.0\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.1\(4.0\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.1\(5.0\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.1\(5.0\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.2\(0.0\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.2\(0.0\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:prime_infrastructure:3.2_base:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:prime_infrastructure:3.2_base:*:*:*:*:*:*:*

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