CVE-2019-19735 Vulnerability Analysis & Exploit Details

CVE-2019-19735
Vulnerability Scoring

9.1
/10
Critical Risk

As a catastrophic security flaw, CVE-2019-19735 has severe implications, demanding immediate intervention.

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: None
    No 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-2019-19735 Details

Status: Modified

Last updated: 🕟 21 Nov 2024, 04:35 UTC
Originally published on: 🕔 30 Dec 2019, 17:15 UTC

Time between publication and last update: 1787 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2019-19735 Vulnerability Summary

CVE-2019-19735: class.userpeer.php in MFScripts YetiShare 3.5.2 through 4.5.3 uses an insecure method of creating password reset hashes (based only on microtime), which allows an attacker to guess the hash and set the password within a few hours by bruteforcing.

Assessing the Risk of CVE-2019-19735

Access Complexity Graph

The exploitability of CVE-2019-19735 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-2019-19735

With low attack complexity and no required privileges, CVE-2019-19735 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-2019-19735, 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-2019-19735, 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-2019-19735 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2019-19735 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2019-19735 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: 0.718% (probability of exploit)

EPSS Percentile: 80.8% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 19.200000000000003% of others.

CVE-2019-19735 References

External References

CWE Common Weakness Enumeration

CWE-916

CAPEC Common Attack Pattern Enumeration and Classification

  • Rainbow Table Password Cracking CAPEC-55 An attacker gets access to the database table where hashes of passwords are stored. They then use a rainbow table of pre-computed hash chains to attempt to look up the original password. Once the original password corresponding to the hash is obtained, the attacker uses the original password to gain access to the system.

Vulnerable Configurations

  • cpe:2.3:a:mfscripts:yetishare:3.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:3.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:3.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:3.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:3.11:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:3.11:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.0:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.1:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.2:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.3:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.4:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.5:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.5:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:mfscripts:yetishare:4.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:mfscripts:yetishare:4.5.3:*:*:*:*:*:*:*

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