GNU Binutils bfd_section_from_shdr Function Denial of Service Vulnerability [CVE-2018-8945]
A vulnerability in the elf.c source code of GNU Binutils could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is in the bfd_section_from_shdr function and is due to improper bounds checking that is performed by the affected software. An attacker could exploit this vulnerability by submitting a crafted file to the affected software. A successful exploit could allow the attacker to cause a DoS condition on the system.
Proof-of-concept code that demonstrates an exploit of this vulnerability is publicly available.
The vendor has confirmed the vulnerability and released a software patch.
CVE Number – CVE-2018-8945
Analysis
To exploit this vulnerability, the attacker must submit a crafted ELF file to a targeted system, making exploitation difficult in environments that restrict network access from untrusted sources.
Safeguards
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Vendor Announcements
The vendor has released a bug report at the following link: Bug 22809
Fixed Software
The vendor has released a software patch at the following link: GNU Binutils Patch.
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.