A GNU binutils security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

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Ubuntu Security Notice USN-5124-1
October 25, 2021

binutils vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in GNU binutils.

Software Description:
- binutils: GNU assembler, linker and binary utilities

Details:

It was discovered that GNU binutils incorrectly handled certain hash
lookups. An attacker could use this issue to cause GNU binutils to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2020-16592)

It was discovered that GNU binutils incorrectly handled certain corrupt
DWARF debug sections. An attacker could possibly use this issue to cause
GNU binutils to consume memory, resulting in a denial of service.
(CVE-2021-3487)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
binutils 2.34-6ubuntu1.3
binutils-multiarch 2.34-6ubuntu1.3

Ubuntu 18.04 LTS:
binutils 2.30-21ubuntu1~18.04.7
binutils-multiarch 2.30-21ubuntu1~18.04.7

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5124-1
CVE-2020-16592, CVE-2021-3487

Package Information:
  https://launchpad.net/ubuntu/+source/binutils/2.34-6ubuntu1.3
  https://launchpad.net/ubuntu/+source/binutils/2.30-21ubuntu1~18.04.7