Permissions, Privileges, and Access Controls in gnome-shell

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU41743

Risk: Medium

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-7221

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The automatic screen lock functionality in GNOME Shell (aka gnome-shell) before 3.10 does not prevent access to the "Enter a Command" dialog, which allows physically proximate attackers to execute arbitrary commands by leveraging an unattended workstation.

Mitigation

Install update from vendor's website.

Vulnerable software versions

gnome-shell: 3.0.0 - 3.9.91

CPE2.3

• cpe:2.3:a:gnome:gnome-shell:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.1.92:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.2.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.3.92:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.5.92:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.6.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.7.92:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.8.4:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:gnome-shell:3.9.91:*:*:*:*:*:*:*

External links

https://www.openwall.com/lists/oss-security/2013/12/27/4
https://www.openwall.com/lists/oss-security/2013/12/27/8
https://bugzilla.gnome.org/show_bug.cgi?id=708313
https://git.gnome.org/browse/gnome-shell/commit/js/ui/main.js?id=efdf1ff755943fba1f8a9aaeff77daa3ed338088

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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