Ubuntu update for binutils

Published: 2021-10-25

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-16592 CVE-2021-3487
CWE-ID	CWE-416 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system binutils (Ubuntu package) Operating systems & Components / Operating system package or component binutils-multiarch (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU79345

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-16592

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local attacker to perform a denial of service attack.

The vulnerability exists in bfd_hash_lookup. A local attacker can trick the victim into opening a specially crafted data, trigger use-after-free and perform a denial of service attack.

Mitigation

Update the affected package binutils to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

binutils (Ubuntu package): before 2.30-21ubuntu1~18.04.7

binutils-multiarch (Ubuntu package): before 2.30-21ubuntu1~18.04.7

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5124-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU61550

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3487

CWE-ID: CWE-20 - Improper input validation