CentOS 6 update for sudo



| Updated: 2020-03-28
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-18634
CWE-ID CWE-121
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 CentOS
Operating systems & Components / Operating system

Vendor CentOS Project

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Stack-based buffer overflow

EUVDB-ID: #VU24810

Risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-18634

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: Yes

Description

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.

Mitigation

Update the affected packages.

Vulnerable software versions

CentOS: 6

CPE2.3 External links

http://lists.centos.org/pipermail/centos-announce/2020-March/035656.html


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. However, proof of concept for this vulnerability is available.



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