Permissions, Privileges, and Access Controls in Fedoraproject Fedora

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU40591

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-7496

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

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by holding the Escape key.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Fedora: 23

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*

External links

https://lists.fedoraproject.org/pipermail/package-announce/2015-November/172328.html
https://www.openwall.com/lists/oss-security/2015/11/17/10
https://www.openwall.com/lists/oss-security/2015/11/17/8
https://access.redhat.com/errata/RHSA-2017:2128
https://bugzilla.gnome.org/show_bug.cgi?id=758032
https://download.gnome.org/sources/gdm/3.18/gdm-3.18.2.news

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.