CVE-2018-20651: Null Pointer Dereference
First published: Tue Jan 01 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU Binutils | =2.31.1 | |
| debian/binutils | 2.35.2-2 2.40-2 2.43.1-5 |
Remedy
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=54025d5812ff100f5f0654eb7e1ffd50f2e37f5f
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00072.html
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00008.html
- http://www.securityfocus.com/bid/106440
- https://security.gentoo.org/glsa/201908-01
- https://sourceware.org/bugzilla/show_bug.cgi?id=24041
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=54025d5812ff100f5f0654eb7e1ffd50f2e37f5f
- https://support.f5.com/csp/article/K38336243
- https://usn.ubuntu.com/4336-1/
- https://launchpad.net/bugs/cve/CVE-2018-20651
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git%3Bh=54025d5812ff100f5f0654eb7e1ffd50f2e37f5f
- https://security-tracker.debian.org/tracker/CVE-2018-20651
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20651
- https://nvd.nist.gov/vuln/detail/CVE-2018-20651
- https://ubuntu.com/security/CVE-2018-20651
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2018-20651.
What is the severity of CVE-2018-20651?
The severity of CVE-2018-20651 is not provided.
How does CVE-2018-20651 occur?
CVE-2018-20651 occurs due to a NULL pointer dereference in elf_link_add_object_symbols in elflink.c in the Binary File Descriptor (BFD) library.
What can a specially crafted ELF file do to exploit CVE-2018-20651?
A specially crafted ELF file can allow remote attackers to cause a NULL pointer dereference, resulting in a denial of service.
How can I fix CVE-2018-20651?
To fix CVE-2018-20651, update the affected software to the recommended versions or apply the provided remedies.
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