SUSE update for zsh

Published: 2022-01-24

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-0502 CVE-2018-13259
CWE-ID	CWE-862
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	SUSE OpenStack Cloud Crowbar Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Operating systems & Components / Operating system HPE Helion Openstack Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE OpenStack Cloud Operating systems & Components / Operating system zsh-debugsource Operating systems & Components / Operating system package or component zsh-debuginfo Operating systems & Components / Operating system package or component zsh Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Authorization bypass

EUVDB-ID: #VU14702

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-0502

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No

Description

The vulnerability allows a local attacker to execute a program without proper authorization on the target system.

The vulnerability exists due to improper handling of the beginning of a shebang (#!) script file. A local attacker can execute a shebang script file that submits malicious input, pass content from the second line of the file to execve() and execute a program without proper authorization on the system.

Mitigation

Update the affected package zsh to the latest version.

Vulnerable software versions

SUSE OpenStack Cloud Crowbar: 8 - 9

SUSE Linux Enterprise Server for SAP: 12-SP3 - 12-SP4

HPE Helion Openstack: 8

SUSE Linux Enterprise Server: 12-SP2-BCL - 12-SP5

SUSE OpenStack Cloud: 8 - 9

zsh-debugsource: before 5.0.5-6.12.2

zsh-debuginfo: before 5.0.5-6.12.2

zsh: before 5.0.5-6.12.2

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220161-1/

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

2) Authorization bypass

EUVDB-ID: #VU14701