CVE-2015-1743 Vulnerability Analysis & Exploit Details

CVE-2015-1743
Vulnerability Scoring

5.1
/10
Significant Risk

Security teams should be aware that CVE-2015-1743 may be exploited under specific circumstances, requiring timely patches.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No authentication is required for exploitation.
  • Scope:
    Impact is confined to the initially vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2015-1743 Details

Status: Modified

Last updated: 🕑 21 Nov 2024, 02:26 UTC
Originally published on: 🕜 10 Jun 2015, 01:59 UTC

Time between publication and last update: 3452 days

CVSS Release: version 2

CVE-2015-1743 Vulnerability Summary

CVE-2015-1743: Microsoft Internet Explorer 7 through 11 allows remote attackers to gain privileges via a crafted web site, aka "Internet Explorer Elevation of Privilege Vulnerability," a different vulnerability than CVE-2015-1748.

Assessing the Risk of CVE-2015-1743

Access Complexity Graph

The exploitability of CVE-2015-1743 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-2015-1743

CVE-2015-1743 requires high complexity, reducing its exploitability but still posing a risk.

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-2015-1743, 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-2015-1743, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2015-1743 does not compromise confidentiality.
  • Integrity: None
    CVE-2015-1743 does not impact data integrity.
  • Availability: None
    CVE-2015-1743 does not affect 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: 4.299% (probability of exploit)

EPSS Percentile: 92.4% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 7.599999999999994% of others.

CVE-2015-1743 References

External References

CWE Common Weakness Enumeration

CWE-367

CAPEC Common Attack Pattern Enumeration and Classification

  • Leveraging Race Conditions via Symbolic Links CAPEC-27 This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions CAPEC-29 This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.

Vulnerable Configurations

  • cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*
    cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*

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