CVE-2017-7528 Vulnerability Analysis & Exploit Details

CVE-2017-7528
Vulnerability Scoring

5.2
/10
Significant Risk

Security assessments indicate that CVE-2017-7528 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Adjacent_network
    Attack Vector Under Analysis
  • Privileges Required: High
    High-level privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2017-7528 Details

Status: Modified

Last updated: 🕞 21 Nov 2024, 03:32 UTC
Originally published on: 🕓 22 Aug 2018, 16:29 UTC

Time between publication and last update: 2282 days

CVSS Release: version 3

CVSS3 Source

secalert@redhat.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2017-7528 Vulnerability Summary

CVE-2017-7528: Ansible Tower as shipped with Red Hat CloudForms Management Engine 5 is vulnerable to CRLF Injection. It was found that X-Forwarded-For header allows internal servers to deploy other systems (using callback).

Assessing the Risk of CVE-2017-7528

Access Complexity Graph

The exploitability of CVE-2017-7528 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-2017-7528

The exploitability of CVE-2017-7528 is influenced by multiple factors. Security teams should analyze system configurations and apply appropriate countermeasures to mitigate threats.

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-2017-7528, 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-2017-7528, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2017-7528 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: High
    CVE-2017-7528 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2017-7528 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.059% (probability of exploit)

EPSS Percentile: 27.9% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 72.1% of others.

CVE-2017-7528 References

External References

CWE Common Weakness Enumeration

CWE-93

CAPEC Common Attack Pattern Enumeration and Classification

  • Command Delimiters CAPEC-15 An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or denylist input validation, as opposed to allowlist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or denylist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
  • Web Server Logs Tampering CAPEC-81 Web Logs Tampering attacks involve an attacker injecting, deleting or otherwise tampering with the contents of web logs typically for the purposes of masking other malicious behavior. Additionally, writing malicious data to log files may target jobs, filters, reports, and other agents that process the logs in an asynchronous attack pattern. This pattern of attack is similar to "Log Injection-Tampering-Forging" except that in this case, the attack is targeting the logs of the web server and not the application.

Vulnerable Configurations

  • cpe:2.3:a:redhat:ansible_tower:-:*:*:*:*:*:*:*
    cpe:2.3:a:redhat:ansible_tower:-:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:cloudforms_management_engine:5.0:*:*:*:*:*:*:*
    cpe:2.3:a:redhat:cloudforms_management_engine:5.0:*:*:*:*:*:*:*

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