GLib GVariant Deserialization Heap Buffer Overflow: CVE-2023-32643 September 2023

A flaw was found in GLib. The GVariant deserialization code is vulnerable to a heap buffer overflow introduced by the fix for CVE-2023-32665. This bug does not affect any released version of GLib, but does affect GLib distributors who followed the guidance of GLib developers to backport the initial fix for CVE-2023-32665.

Vulnerability Analysis

CVE-2023-32643 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.

Attack Vector:

LOCAL

Attack Complexity:

LOW

Privileges Required:

NONE

User Interaction:

REQUIRED

Scope:

UNCHANGED

Confidentiality Impact:

LOW

Integrity Impact:

LOW

Availability Impact:

LOW

Weakness Type

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().

Products Associated with CVE-2023-32643

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Affected Versions

Exploit Probability

EPSS

0.04%

Percentile

13.25%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.