CVE-2018-20651 Null dereference in n/a
A crafted ELF file causes a NULL pointer dereference in the BFD library, allowing remote attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-20651?
CVE-2018-20651 is a medium-severity vulnerability in Gnu Binutils, published on 1 Jan 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A NULL pointer dereference was discovered in elf_link_add_object_symbols in elflink.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.31.1. This occurs for a crafted ET_DYN with no program headers. A specially crafted ELF file allows remote attackers to cause a denial of service, as demonstrated by ld.
Weakness: CWE-476
Which versions are affected by CVE-2018-20651?
It affects 1 product.
Products include Gnu Binutils.
How do I fix CVE-2018-20651?
Upgrade to a fixed version.
Is CVE-2018-20651 being exploited?
There is no known exploitation of CVE-2018-20651 in the wild and no public exploit code.
Other vulnerabilities in Gnu Binutils
Sources
Also known as DEBIAN-CVE-2018-20651, GHSA-w8vj-984w-6pcp, UBUNTU-CVE-2018-20651.