How the Mentioned CVE Works:
CVE-2025-1150 is a critical memory leak vulnerability found in GNU Binutils version 2.43. The issue resides in the `bfd_malloc` function within the `libbfd.c` file, a core component of the linker (ld). The vulnerability allows remote attackers to exploit the memory leak, potentially leading to resource exhaustion and system instability. While the attack complexity is high and exploitation is difficult, the public disclosure of the exploit increases the risk. The memory leak occurs due to improper handling of memory allocation, which fails to release memory after use. This can be exploited by crafting malicious input to the linker, causing repeated memory leaks over time. The maintainers have addressed the issue in the master branch but have refrained from backporting fixes to version 2.44 due to stability concerns.
DailyCVE Form:
Platform: GNU Binutils
Version: 2.43
Vulnerability: Memory Leak
Severity: Critical
Date: 02/10/2025
What Undercode Say:
Exploitation Details:
- Exploit Vector: Remote exploitation via crafted input to the linker (
ld). - Payload: Malicious binary or object file designed to trigger repeated memory allocations.
- Impact: Resource exhaustion, system instability, and potential denial of service.
Exploitation Commands:
Craft malicious object file using objdump objcopy --input-target=binary --output-target=elf32-i386 payload.bin payload.o Link malicious object file to trigger memory leak ld payload.o -o malicious_binary
Protection Measures:
- Patch: Upgrade to the latest master branch of GNU Binutils where the issue is fixed.
- Workaround: Limit untrusted input to the linker and monitor memory usage.
- Detection: Use tools like Valgrind to detect memory leaks in the linker.
Detection Commands:
Use Valgrind to detect memory leaks valgrind --leak-check=full ld payload.o -o test_binary
Code Fix Example:
// Fix for bfd_malloc in libbfd.c
void bfd_malloc(size_t size) {
void ptr = malloc(size);
if (ptr == NULL) {
bfd_set_error(bfd_error_no_memory);
}
return ptr;
}
// Ensure proper memory deallocation
void bfd_free(void ptr) {
if (ptr) {
free(ptr);
}
}
Analytics:
- CVSS Score: 9.1 (Critical)
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
References:
- bash
- bash
- bash
By following these steps, users can mitigate the risks associated with CVE-2025-1150 and ensure system stability.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-1150
Extra Source Hub:
Undercode
