CVE-2021-33181 Vulnerability Analysis & Exploit Details

CVE-2021-33181
Vulnerability Scoring

6.6
/10
High Risk

If left unpatched, CVE-2021-33181 could lead to major system disruptions or data loss.

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: High
    High-level privileges are required for exploitation.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-33181 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:08 UTC
Originally published on: 🕑 01 Jun 2021, 14:15 UTC

Time between publication and last update: 1268 days

CVSS Release: version 3

CVSS3 Source

security@synology.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-33181 Vulnerability Summary

CVE-2021-33181: Server-Side Request Forgery (SSRF) vulnerability in webapi component in Synology Video Station before 2.4.10-1632 allows remote authenticated users to send arbitrary request to intranet resources via unspecified vectors.

Assessing the Risk of CVE-2021-33181

Access Complexity Graph

The exploitability of CVE-2021-33181 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-2021-33181

The exploitability of CVE-2021-33181 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-2021-33181, 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-2021-33181, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2021-33181 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: Low
    Exploiting CVE-2021-33181 may cause minor changes to data without severely impacting its accuracy.
  • Availability: Low
    CVE-2021-33181 may slightly degrade system performance without fully affecting service availability.

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.068% (probability of exploit)

EPSS Percentile: 32.78% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 67.22% of others.

CVE-2021-33181 References

External References

CWE Common Weakness Enumeration

CWE-918

CAPEC Common Attack Pattern Enumeration and Classification

  • Server Side Request Forgery CAPEC-664 An adversary exploits improper input validation by submitting maliciously crafted input to a target application running on a server, with the goal of forcing the server to make a request either to itself, to web services running in the server’s internal network, or to external third parties. If successful, the adversary’s request will be made with the server’s privilege level, bypassing its authentication controls. This ultimately allows the adversary to access sensitive data, execute commands on the server’s network, and make external requests with the stolen identity of the server. Server Side Request Forgery attacks differ from Cross Site Request Forgery attacks in that they target the server itself, whereas CSRF attacks exploit an insecure user authentication mechanism to perform unauthorized actions on the user's behalf.

Vulnerable Configurations

  • cpe:2.3:a:synology:video_station:-:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:-:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.2-0439:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.2-0439:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.2-0443:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.2-0443:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.2-0447:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.2-0447:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.2-0451:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.2-0451:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.2-0453:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.2-0453:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.3-0562:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.3-0562:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0667:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0667:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0668:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0668:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0673:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0673:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0674:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0674:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0678:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0678:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.4-0679:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.4-0679:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0753:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0753:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0754:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0754:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0757:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0757:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0763:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0763:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0770:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0770:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0772:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0772:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0775:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0775:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.5-0776:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.5-0776:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0835:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0835:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0840:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0840:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0841:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0841:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0844:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0844:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0857:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0857:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0858:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0858:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:1.6-0859:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:1.6-0859:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.0-1124:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.0-1124:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.0-1132:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.0-1132:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.0-1134:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.0-1134:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.1.0-1226:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.1.0-1226:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.1.1-1229:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.1.1-1229:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.1.2-1236:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.1.2-1236:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.2.0-1361:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.2.0-1361:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.2.1-1364:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.2.1-1364:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.0-1435:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.0-1435:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.1-1453:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.1-1453:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.2-1454:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.2-1454:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.3-1455:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.3-1455:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.4-1468:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.4-1468:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.5-1471:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.5-1471:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.6-1475:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.6-1475:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.7-1484:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.7-1484:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.3.8-1486:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.3.8-1486:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.4.0-1505:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.4.0-1505:*:*:*:*:*:*:*
  • cpe:2.3:a:synology:video_station:2.4.1-1554:*:*:*:*:*:*:*
    cpe:2.3:a:synology:video_station:2.4.1-1554:*:*:*:*:*:*:*

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