Red Hat update for sudo

Published: 2020-02-14
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-18634
Exploitation vector Local
Public exploit N/A
Vulnerable software
Red Hat Enterprise Linux Server - Update Services for SAP Solutions
Operating systems & Components / Operating system package or component

Vendor Red Hat Inc.

Security Advisory

This security advisory describes one low risk vulnerability.

1) Stack-based buffer overflow

Severity: Low

CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-18634

CWE-ID: CWE-121 - Stack-based Buffer Overflow


The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the getln() function in tgetpass.c, if pwfeedback is enabled in /etc/sudoers. A local user can trigger stack-based buffer overflow and execute arbitrary code on the target system with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server - Update Services for SAP Solutions: 8.0

CPE External links

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.