CVE-2023-4911 : Detail

CVE-2023-4911

7.8
/
High
Overflow
22.85%V3
Local
2023-10-03
17h25 +00:00
2025-01-28
16h07 +00:00
CVE.org
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CVE Descriptions

Glibc: buffer overflow in ld.so leading to privilege escalation

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-122 Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-787 Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

Metrics

Metrics Score Severity CVSS Vector Source
V3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Local

The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities.

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

Low

The attacker requires privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

CISA KEV (Known Exploited Vulnerabilities)

Vulnerability name : GNU C Library Buffer Overflow Vulnerability

Required action : Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known To Be Used in Ransomware Campaigns : Unknown

Added : 2023-11-20 23h00 +00:00

Action is due : 2023-12-11 23h00 +00:00

Important information
This CVE is identified as vulnerable and poses an active threat, according to the Catalog of Known Exploited Vulnerabilities (CISA KEV). The CISA has listed this vulnerability as actively exploited by cybercriminals, emphasizing the importance of taking immediate action to address this flaw. It is imperative to prioritize the update and remediation of this CVE to protect systems against potential cyberattacks.

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Products Mentioned

Configuraton 0

Gnu>>Glibc >> Version From (including) 2.34 To (excluding) 2.39

Configuraton 0

Fedoraproject>>Fedora >> Version 37

Fedoraproject>>Fedora >> Version 38

Fedoraproject>>Fedora >> Version 39

Configuraton 0

Redhat>>Codeready_linux_builder >> Version 9.0

Redhat>>Codeready_linux_builder_eus >> Version 8.6

Redhat>>Codeready_linux_builder_eus >> Version 9.2

Redhat>>Codeready_linux_builder_eus >> Version 9.4

    Redhat>>Codeready_linux_builder_for_arm64 >> Version 9.0_aarch64

    Redhat>>Codeready_linux_builder_for_arm64_eus >> Version 8.6

    Redhat>>Codeready_linux_builder_for_arm64_eus >> Version 9.2_aarch64

    Redhat>>Codeready_linux_builder_for_arm64_eus >> Version 9.4_aarch64

      Redhat>>Codeready_linux_builder_for_ibm_z_systems >> Version 9.0_s390x

      Redhat>>Codeready_linux_builder_for_ibm_z_systems_eus >> Version 8.6

      Redhat>>Codeready_linux_builder_for_ibm_z_systems_eus >> Version 9.2_s390x

      • Redhat>>Codeready_linux_builder_for_ibm_z_systems_eus >> Version 9.2_s390x (Open CPE detail)

      Redhat>>Codeready_linux_builder_for_ibm_z_systems_eus >> Version 9.4_s390x

        Redhat>>Codeready_linux_builder_for_power_little_endian >> Version 9.0_ppc64le

        • Redhat>>Codeready_linux_builder_for_power_little_endian >> Version 9.0_ppc64le (Open CPE detail)

        Redhat>>Codeready_linux_builder_for_power_little_endian_eus >> Version 8.6

        • Redhat>>Codeready_linux_builder_for_power_little_endian_eus >> Version 8.6 (Open CPE detail)

        Redhat>>Codeready_linux_builder_for_power_little_endian_eus >> Version 9.2_ppc64le

        • Redhat>>Codeready_linux_builder_for_power_little_endian_eus >> Version 9.2_ppc64le (Open CPE detail)

        Redhat>>Codeready_linux_builder_for_power_little_endian_eus >> Version 9.4_ppc64le

          Redhat>>Virtualization >> Version 4.0

          Redhat>>Virtualization_host >> Version 4.0

          Redhat>>Enterprise_linux >> Version 8.0

          Redhat>>Enterprise_linux >> Version 9.0

          Redhat>>Enterprise_linux_eus >> Version 8.6

          Redhat>>Enterprise_linux_eus >> Version 9.2

          Redhat>>Enterprise_linux_eus >> Version 9.4

          Redhat>>Enterprise_linux_for_arm_64 >> Version 9.0_aarch64

          Redhat>>Enterprise_linux_for_arm_64_eus >> Version 8.6_aarch64

          Redhat>>Enterprise_linux_for_arm_64_eus >> Version 9.2_aarch64

          Redhat>>Enterprise_linux_for_arm_64_eus >> Version 9.4_aarch64

          Redhat>>Enterprise_linux_for_ibm_z_systems >> Version 9.0_s390x

          Redhat>>Enterprise_linux_for_ibm_z_systems_eus >> Version 9.2_s390x

          Redhat>>Enterprise_linux_for_ibm_z_systems_eus >> Version 9.4_s390x

          Redhat>>Enterprise_linux_for_ibm_z_systems_eus_s390x >> Version 8.6

          Redhat>>Enterprise_linux_for_power_big_endian_eus >> Version 8.6_ppc64le

          • Redhat>>Enterprise_linux_for_power_big_endian_eus >> Version 8.6_ppc64le (Open CPE detail)

          Redhat>>Enterprise_linux_for_power_little_endian >> Version 9.0_ppc64le

          Redhat>>Enterprise_linux_for_power_little_endian_eus >> Version 9.2_ppc64le

          • Redhat>>Enterprise_linux_for_power_little_endian_eus >> Version 9.2_ppc64le (Open CPE detail)

          Redhat>>Enterprise_linux_for_power_little_endian_eus >> Version 9.4_ppc64le

          • Redhat>>Enterprise_linux_for_power_little_endian_eus >> Version 9.4_ppc64le (Open CPE detail)

          Redhat>>Enterprise_linux_server_aus >> Version 8.6

          Redhat>>Enterprise_linux_server_aus >> Version 9.2

          Redhat>>Enterprise_linux_server_aus >> Version 9.4

          Redhat>>Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions >> Version 9.2_ppc64le

          • Redhat>>Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions >> Version 9.2_ppc64le (Open CPE detail)

          Redhat>>Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions >> Version 9.4_ppc64le

          • Redhat>>Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions >> Version 9.4_ppc64le (Open CPE detail)

          Redhat>>Enterprise_linux_server_tus >> Version 8.6

          Configuraton 0

          Canonical>>Ubuntu_linux >> Version 22.04

          Canonical>>Ubuntu_linux >> Version 23.04

          Debian>>Debian_linux >> Version 11.0

          Debian>>Debian_linux >> Version 12.0

          Configuraton 0

          Netapp>>H410c_firmware >> Version -

          Netapp>>H410c >> Version -

          Configuraton 0

          Netapp>>H300s_firmware >> Version -

          Netapp>>H300s >> Version -

          Configuraton 0

          Netapp>>H500s_firmware >> Version -

          Netapp>>H500s >> Version -

          Configuraton 0

          Netapp>>H700s_firmware >> Version -

          Netapp>>H700s >> Version -

          Configuraton 0

          Netapp>>H410s_firmware >> Version -

          Netapp>>H410s >> Version -

          Configuraton 0

          Netapp>>Ontap_select_deploy_administration_utility >> Version -

          References

          https://access.redhat.com/errata/RHSA-2023:5453
          Tags : vendor-advisory, x_refsource_REDHAT
          https://access.redhat.com/errata/RHSA-2023:5454
          Tags : vendor-advisory, x_refsource_REDHAT
          https://access.redhat.com/errata/RHSA-2023:5455
          Tags : vendor-advisory, x_refsource_REDHAT
          https://access.redhat.com/errata/RHSA-2023:5476
          Tags : vendor-advisory, x_refsource_REDHAT
          https://access.redhat.com/errata/RHSA-2024:0033
          Tags : vendor-advisory, x_refsource_REDHAT
          https://access.redhat.com/security/cve/CVE-2023-4911
          Tags : vdb-entry, x_refsource_REDHAT
          https://bugzilla.redhat.com/show_bug.cgi?id=2238352
          Tags : issue-tracking, x_refsource_REDHAT
          https://www.qualys.com/cve-2023-4911/
          Tags : Third Party Advisory
          http://seclists.org/fulldisclosure/2023/Oct/11
          Tags : Exploit, Mailing List, Third Party Advisory