CVE-2022-38497

Vulnerability

Overview

CVE-2022-38497 is a segmentation violation (SEGV) in the LIEF library, specifically in the CoreFile::parse_ template function at CoreFile.tcc:69 [1][3]. The bug occurs when parsing a malformed ELF core file, leading to a null pointer dereference that crashes the application. The issue was reported in LIEF issue #766 and affects commit 365a16a [3].

Exploitation

An attacker can exploit this vulnerability by supplying a specially crafted ELF core file to any application that uses LIEF to parse core dumps. No authentication or special privileges are required; the attack vector is local or remote if the application accepts user-supplied files. The crash is triggered during the parsing of the core file's note segment, where a null pointer is written to, causing a segmentation fault [3].

Impact

Successful exploitation results in a denial of service (DoS) by crashing the application. Since LIEF is a library used for binary analysis and modification, this could affect tools like debuggers, malware analyzers, or any software that relies on LIEF for ELF core file processing. The vulnerability does not lead to code execution or privilege escalation based on available information [4].

Mitigation

The vulnerability has been fixed in commit ca93874 by the LIEF project [1]. Users are advised to update to a version containing this fix or apply the patch manually. No workarounds are documented; the safest mitigation is to upgrade LIEF to the latest release [2][4].