CVE-2024-2494

MEDIUM

Memory Allocation with Excessive Size Value (CWE-789)

2024-03-21 secalert@redhat.com

Deserialization Denial Of Service

6.2

CVSS 3.1 · Vendor: redhat

Severity by source

Vendor (redhat) PRIMARY

6.2 MEDIUM

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

Primary rating from Vendor (redhat) · only source for this CVE.

CVSS VectorVendor: redhat

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Mar 21, 2024 - 14:15 cve.org

MEDIUM 6.2

DescriptionCVE.org

A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.

AnalysisAI

A flaw was found in the RPC library APIs of libvirt. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-789. A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.