CVE-2023-43787: fedoraproject fedora Heap-based Buffer Overflow

Vulnerability summary

CVE-2023-43787 is a high (CVSS 7.8) Heap-based Buffer Overflow vulnerability in fedoraproject fedora. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.7% of scored vulnerabilities.

Timeline

1. 10-10-2023
   PublishedVulnerability first disclosed.
2. 06-11-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.

• CWE-122Heap-based Buffer OverflowA 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-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.