CVE-2019-18276 Vulnerability Analysis & Exploit Details

CVE-2019-18276
Vulnerability Scoring

7.8
/10
Very High Risk

Highly exploitable, CVE-2019-18276 poses a critical security risk that could lead to severe breaches.

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: 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-2019-18276 Details

Status: Modified

Last updated: 🕟 21 Nov 2024, 04:32 UTC
Originally published on: 🕐 28 Nov 2019, 01:15 UTC

Time between publication and last update: 1820 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2019-18276 Vulnerability Summary

CVE-2019-18276: An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

Assessing the Risk of CVE-2019-18276

Access Complexity Graph

The exploitability of CVE-2019-18276 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-2019-18276

CVE-2019-18276 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation 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-2019-18276, 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-2019-18276, 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-2019-18276 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2019-18276 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2019-18276 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: 0.175% (probability of exploit)

EPSS Percentile: 55.75% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 44.25% of others.

CVE-2019-18276 References

External References

CWE Common Weakness Enumeration

CWE-273

Vulnerable Configurations

  • cpe:2.3:a:gnu:bash:-:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:-:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.2:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.2:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.3:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.3:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.4:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.4:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.5:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.5:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.6:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.6:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:1.14.7:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:1.14.7:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.01:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.01:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.01.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.01.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.02:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.02:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.02.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.02.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.03:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.03:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.04:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.04:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.05:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.05:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.05:a:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.05:a:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:2.05:b:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:2.05:b:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.0.16:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.0.16:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.2:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.2.48:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.2.48:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:3.2.57:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:3.2.57:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.2:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.2.53:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.2.53:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.3:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.3.30:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.3.30:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:-:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:-:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4.12:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4.12:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4.18:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4.18:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:beta2:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:beta2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch10:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch10:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch11:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch11:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch12:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch12:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch13:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch13:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch14:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch14:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch15:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch15:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch16:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch16:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch17:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch17:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch18:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch18:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch19:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch19:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch2:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch3:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch4:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch4:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch5:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch5:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch6:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch6:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch7:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch7:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch8:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch8:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:4.4:patch9:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:4.4:patch9:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:-:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:-:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:*
  • cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
    cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vmware:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vmware:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:*:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:*:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:linux:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:linux:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vmware_vsphere:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vmware_vsphere:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:windows:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:windows:*:*
  • cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vsphere:*:*
    cpe:2.3:a:netapp:oncommand_unified_manager:9.5:*:*:*:*:vsphere:*:*
  • cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
    cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2019-18276: Combat Critical CVE Threats

Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.

Other 5 Recently Published CVEs Vulnerabilities

  • CVE-2025-2129 – A vulnerability was found in Mage AI 0.9.75. It has been classified as problematic. This affects an unknown part. The manipulation leads to insecur...
  • CVE-2025-2127 – A vulnerability was found in JoomlaUX JUX Real Estate 3.4.0 on Joomla. It has been classified as problematic. Affected is an unknown function of th...
  • CVE-2025-2126 – A vulnerability was found in JoomlaUX JUX Real Estate 3.4.0 on Joomla and classified as critical. This issue affects some unknown processing of the...
  • CVE-2025-2125 – A vulnerability has been found in Control iD RH iD 25.2.25.0 and classified as problematic. This vulnerability affects unknown code of the file /v2...
  • CVE-2025-2124 – A vulnerability, which was classified as problematic, was found in Control iD RH iD 25.2.25.0. This affects an unknown part of the file /v2/custome...