CVE-2019-3698 Vulnerability Analysis & Exploit Details

CVE-2019-3698
Vulnerability Scoring

7.0
/10
High Risk

If left unpatched, CVE-2019-3698 could lead to major system disruptions or data loss.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2019-3698 Details

Status: Analyzed

Last updated: 🕧 14 Sep 2021, 12:39 UTC
Originally published on: 🕑 28 Feb 2020, 14:15 UTC

Time between publication and last update: 563 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2019-3698 Vulnerability Summary

CVE-2019-3698: UNIX Symbolic Link (Symlink) Following vulnerability in the cronjob shipped with nagios of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 11; openSUSE Factory allows local attackers to cause cause DoS or potentially escalate privileges by winning a race. This issue affects: SUSE Linux Enterprise Server 12 nagios version 3.5.1-5.27 and prior versions. SUSE Linux Enterprise Server 11 nagios version 3.0.6-1.25.36.3.1 and prior versions. openSUSE Factory nagios version 4.4.5-2.1 and prior versions.

Assessing the Risk of CVE-2019-3698

Access Complexity Graph

The exploitability of CVE-2019-3698 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-2019-3698

This vulnerability, CVE-2019-3698, requires a high level of attack complexity and low privileges, making it difficult but not impossible to exploit. Organizations should ensure robust security configurations to mitigate risks.

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-2019-3698, 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-2019-3698, 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-2019-3698 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2019-3698 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2019-3698 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.06% (probability of exploit)

EPSS Percentile: 28.27% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 71.73% of others.

CVE-2019-3698 References

External References

CWE Common Weakness Enumeration

CWE-59

CAPEC Common Attack Pattern Enumeration and Classification

  • Symlink Attack CAPEC-132 An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.
  • Using Malicious Files CAPEC-17 An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files CAPEC-35 An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
  • Manipulating Web Input to File System Calls CAPEC-76 An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

Vulnerable Configurations

  • cpe:2.3:a:nagios:nagios:2.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:2.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:2.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:2.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.5:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0.6:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0.6:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta1:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta1:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta2:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta2:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta3:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta3:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta4:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta4:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta5:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta5:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta6:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta6:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:beta7:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:beta7:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:alpha1:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:alpha1:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:alpha2:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:alpha2:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:alpha3:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:alpha3:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:alpha4:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:alpha4:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.0:alpha5:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.0:alpha5:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nagios:nagios:3.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:nagios:nagios:3.4.4:*:*:*:*:*:*:*
  • cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*
    cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*
  • cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
    cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
  • cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*
    cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
    cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

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