CVE-2021-35995 Vulnerability Analysis & Exploit Details

CVE-2021-35995
Vulnerability Scoring

3.3
/10
Moderate Risk

Exploiting CVE-2021-35995 requires specific conditions, leading to a moderate security impact.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2021-35995 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:12 UTC
Originally published on: 🕔 02 Sep 2021, 17:15 UTC

Time between publication and last update: 1175 days

CVSS Release: version 3

CVSS3 Source

psirt@adobe.com

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVE-2021-35995 Vulnerability Summary

CVE-2021-35995: Adobe After Effects version 18.2.1 (and earlier) is affected by an Improper input validation vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to disclose arbitrary memory information in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Assessing the Risk of CVE-2021-35995

Access Complexity Graph

The exploitability of CVE-2021-35995 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-2021-35995

With low attack complexity and no required privileges, CVE-2021-35995 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

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-2021-35995, 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-2021-35995, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2021-35995 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2021-35995 poses no threat to data integrity.
  • Availability: None
    CVE-2021-35995 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: 0.324% (probability of exploit)

EPSS Percentile: 70.96% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 29.040000000000006% of others.

CVE-2021-35995 References

External References

CWE Common Weakness Enumeration

CWE-665

CAPEC Common Attack Pattern Enumeration and Classification

  • Leveraging Race Conditions CAPEC-26 The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious 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:adobe:after_effects:-:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:-:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:4.0:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:4.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:5.0:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:5.5:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:5.5:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:5.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:5.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:6.0:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:6.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:6.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:7.0:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:7.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:7.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:16:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:16:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:16.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:16.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:17.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:17.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:17.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:17.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:17.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:17.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:18.0:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:18.0:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:18.1:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:18.1:*:*:*:*:*:*:*
  • cpe:2.3:a:adobe:after_effects:18.2:*:*:*:*:*:*:*
    cpe:2.3:a:adobe:after_effects:18.2:*:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

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