External risk intelligence

GLib SOCKS Proxy Buffer Overflow.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2024-52533

This vulnerability affects GLib, a low-level system library used by desktop environments and various applications. While network-reachable via SOCKS proxy functionality, such proxy features are typically used in client-side applications or internal tooling rather than as public-facing internet services. Public internet exposure for this specific component is uncommon in standard deployment patterns.

Buffer Overflow

Gnome Glib

before 2.82.111.010

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory details a critical security vulnerability within the GLib software library, which is a foundational component used across many applications. The flaw could allow for significant compromise of affected systems if exploited, potentially impacting confidentiality, integrity, and availability. The main concern is confirming if this technology is present and exposed in your environment.

Flaw in common software library needs checking.
Critical risk if vulnerable GLib is exposed.
Confirm relevance and potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could target a system by sending specially crafted network traffic to a service that uses the vulnerable GLib component. This traffic, designed to exploit an off-by-one error in the SOCKS4 proxy handling, could trigger a buffer overflow. Successfully triggering this overflow could allow an attacker to compromise the confidentiality, integrity, and availability of the affected system.

No special access is required.
A network request triggers the overflow.
Risk to confidentiality, integrity, and availability.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could affect systems that use the GLib library, particularly when its SOCKS4 proxy functionality is exposed to a network. When exploited, it may allow an attacker to cause a buffer overflow, potentially leading to a denial of service or unauthorized data manipulation.

Affects GLib library when SOCKS4 proxy is used.
Network access may trigger buffer overflow.
Compromise of system integrity or availability.

Operational Fix

Recommended remediation, mitigation, and detection steps

The affected technology, GNOME GLib, is a foundational library used across many systems, meaning ownership could span application owners, platform teams, and infrastructure teams depending on how GLib is integrated and utilized. The first practical step is to identify all instances of GLib within your environment, assess their network exposure and criticality, and then engage the relevant accountable owners to plan remediation.

Identify GLib instances and assess exposure.
Confirm accountable ownership for affected systems.
Plan risk-based remediation actions.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is GNOME GLib?

GLib is a fundamental, low-level software library that provides core data structures and utility functions for many applications. It serves as the building block for the GNOME desktop environment and is widely utilized across Linux systems and various cross-platform software to manage essential tasks like memory allocation, file handling, and network connectivity.

What does CVE-2024-52533 mean?

This CVE identifies a buffer overflow weakness, classified as CWE-120. It occurs because the library fails to allocate enough space to include a null-terminating character when processing SOCKS4 proxy connections. This off-by-one error allows data to write beyond the intended memory buffer, which can lead to system instability or compromise.

How is this buffer overflow triggered?

The vulnerability is triggered by sending specially crafted network traffic to a service that utilizes the affected SOCKS4 proxy code within GLib. Simply interacting with standard, non-proxy related GLib features does not activate this specific bug. It requires a network request to interact with the SOCKS4 handling logic to manifest the error.

Do I need to worry if my system is not internet-facing?

According to Halo Surface Signal, public internet exposure for this specific GLib component is uncommon, as SOCKS proxy features are typically used in client applications or internal tooling. While network-reachable from an attacker's perspective, the risk is lower for systems isolated from public networks and those not configured to use SOCKS4 proxies.

How should I respond to CVE-2024-52533?

Start by identifying where GLib is running across your infrastructure, as it is often bundled inside other software. Assess which applications rely on GLib's SOCKS4 proxy capabilities. Once instances are identified, coordinate with the appropriate application or platform teams to plan for an update to a version beyond the affected range.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.